Size Charts
In order to help you find the information you need as quickly as possible, size charts are organised by product type.
If you can't find the information you're looking for, or you have further questions regarding sizing, don't hesitate to give the mail order team a call on 0800 298 8898 or email us at enquiries@cyclesurgery.com
Bikes
The information below is provided as a rough set of guidelines. Bike sizes are determined by the frame size, based on the length of the seat tube. Each manufacturer measures bike geometry slightly differently and it also depends on your own body's geometry and the style of riding you wish to undertake - whether you'll be blasting down trails on your favourite mountain bike or commuting to work on a road bike.
Please feel free to contact us on 0800 298 8898 for further information and advice.
Women's Bikes
Women are built differently with significantly different proportions in three specific areas that come into contact with a bike, as well as in the spaces between them!
- Hands: Control the steering, braking and shifting of the bike through the handlebars and controls that are attached to them.
- Feet: Connect with the pedals
- Backsides: Connect with the saddle
Women also have shorter torsos, shorter arms, and longer legs than a man of the same height. Women's hands and feet are smaller, their shoulders are narrower and hips wider. These differences can affect the way a bike fits, feels, and handles. Bicycles that have been designed to fit a woman, instead of a man, will provide a different fit in these areas.
Different manufacturers have different approaches and titles for their range of women’s bikes, like ‘WSD’, ‘D4W’ or ‘WFG’, which you’ll find on Trek, Giant and Marin bikes. Some modify a stock "unisex" frame by changing to a shorter stem, smaller handlebars, shorter cranks, and a wider saddle. Others actually design their frames differently - usually with a shorter top tube, a more relaxed head tube angle, a taller head tube, and perhaps a slightly steeper seat tube angle.
Road Bikes
Road bikes tend to have larger wheels and very different geometry to mountain bikes in order to make them as light, fast and as aerodynamic as possible.
| Size | XXS | XS | S | M | L | XL | XXL | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| INCHES | CM | INCHES | CM | INCHES | CM | INCHES | CM | INCHES | CM | INCHES | CM | INCHES | CM | ||
| Frame Size | 47 - 48 | 49 - 50 | 51 - 52 - 53 | 54 - 55 | 56 - 57 - 58 | 58 - 59 - 60 | 61 - 62 - 63 | ||||||||
| Rider Height | 4'10" - 5' | 148 - 152 | 5' - 5'3" | 152 - 160 | 5'3" - 5'6" | 160 - 168 | 5'6" - 5'9" | 168 - 175 | 5'9" - 6' | 175 - 183 | 6' - 6'3" | 183 - 191 | 6'3" - 6'6" | 191 - 198 | |
Women's Road Bikes
| Size | XXS | XS | S | M | L | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| INCHES | CM | INCHES | CM | INCHES | CM | INCHES | CM | INCHES | CM | ||
| Frame Size | 44 - 45 - 46 | 47 - 48 - 49 | 50 - 51 - 52 | 54 - 55 | 56 - 57 - 58 | ||||||
| Rider Height | 4'10" - 5' | 148 - 152 | 5' - 5'3" | 152 - 160 | 5'3" - 5'6" | 160 - 168 | 5'6" - 5'9" | 168 - 175 | 5'9" - 6' | 175 - 183 | |
Mountain Bikes
Whether you're looking for a hardtail, or full suspension bike, the table below will help to give you a rough idea of the size of bike you'll need to hit the trail!
| Size | XS | S | M | L | XL | XXL | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| INCHES | CM | INCHES | CM | INCHES | CM | INCHES | CM | INCHES | CM | INCHES | CM | ||
| Frame Size | 13 - 14 | 15 - 16 | 17 - 18 | 19 - 20 | 21 - 22 | 23 - 24 | |||||||
| Rider Height | 4'10" - 5'2" | 148 - 158 | 5'2" - 5'6" | 158 - 168 | 5'6" - 5'10" | 168 - 178 | 5'10" - 6'1" | 178 - 185 | 6'1" - 6'4" | 185 - 193 | 6'4" - 6'6" | 193 - 198 | |
Women's Mountain Bikes
| Size | XS | S | M | L | |||||
|---|---|---|---|---|---|---|---|---|---|
| INCHES | CM | INCHES | CM | INCHES | CM | INCHES | CM | ||
| Frame Size | 13 - 14 | 15 - 16 | 17 - 18 | 19+ | |||||
| Rider Height | 4'10" - 5'2" | 148 - 158 | 5'2" - 5'6" | 158 - 168 | 5'6" - 5'10" | 168 - 178 | 5'10" - 6'1" | 178 - 185 | |
Hybrid Bikes
A hybrid bike sits between a road bike and a mountain bike - the frame loosely related to a mountain bike, with wheels the same size as a road bike. This kind of bike has a comfortable upright riding position but can deliver pace if the situation arises!
| Size | XS | S | M | L | XL | XXL | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| INCHES | CM | INCHES | CM | INCHES | CM | INCHES | CM | INCHES | CM | INCHES | CM | ||
| Frame Size | 13 - 14 | 15 - 16 | 17 - 18 | 19 - 20 | 21 - 22 | 23 - 25 | |||||||
| Rider Height | 4'10" - 5'1" | 147 - 155 | 5'1" - 5'5" | 155 - 165 | 5'5" - 5'9" | 165 - 175 | 5'9" - 6' | 175 - 183 | 6' - 6'3" | 183 - 191 | 6'3" - 6'6" | 191 - 198 | |
Electric Bikes
A new addition to the CycleSurgery range, electric bikes boost your natural pedal power by utilising a battery-powered motor. Just by pedalling gently, you can reach speeds of up to 15mph, allowing you to get to work as fresh as when you left home.
GoCycle electric bikes follow the one-size-fits-all rule, whereas other brands generally follow similar sizing guidelines to hybrid bikes.
Folding Bikes
Folding bikes are generally one-size-fits-all for people who are 4'10" - 6'4"
Brompton recommend that if you have an inside leg measurement greater than 35 inches, you should consider buying a telescopic seat pillar.
Helmets
Sizing used varies between different brands so the charts below indicate the appropriate size helmet depending on the brand and your head size.
- Measure around your head in centimetres, just above the ear, to find your head size.
- Select the most snug helmet size, without it being unconfortably tight
- Keep in mind that everyone's head shape is different. If you happen to fit between two sizing brackets, it is better to go to the lower sizing bracket if you have a narrow head and up to the next bracket if you have a rounder shape to your head
We are legally unable to refund or exchange helmet returns so please be careful when choosing.
Adult Helmets
| Size | XS | S | M | L | XL | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| INCHES | CM | INCHES | CM | INCHES | CM | INCHES | CM | INCHES | CM | ||
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- | 20-21¾ | 51-55 | 21¾-23¼ | 55-59 | 23¼-24¾ | 59-63 | - | |||
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20½-21¼ | 52-54 | 21¼-22¼ | 54-56.5 | 22¾-23¼ | 57.8-59 | 23¼-23¾ | 59-60.3 | 23¾-24¾ | 60.3-63 | |
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- | 20-21¾ | 51-55 | 21¾-23¼ | 55-59 | 23¼-24¾ | 59-63 | - | |||
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- | - | 21¼-22½ | 54-57 | 22¾-23½/24 | 58-60/61 | - | ||||
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- | S/M 54-56cm | L/XL 57-60cm | ||||||||
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XS/S 51-54cm | M/L 55-58cm | XL/XXL 59-62cm | ||||||||
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- | S/M 54-58cm | L/XL 58-62cm | ||||||||
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- | 20-22½ | 51-57 | 21¼-23½ | 54-60 | 22½-24¾ | 57-63 | - | |||
Clothing
These charts are to be used as a guideline only. Each brand's clothing fits slightly differently and the cut of the clothes are different depending on the type of cycling the item is intended for - for example, mountain biking clothing tends to come up quite large, while road cycling gear should be a tighter, more aerodynamic fit.
Men's Clothing
| Size | SM | MD | LG | XL | XXL |
|---|---|---|---|---|---|
| UK Chest Size (Inches) | 38 | 40 | 42 | 44 | 46 |
Women's Clothing
| Size | XS | SM | MD | LG | XL |
|---|---|---|---|---|---|
| UK Dress Size | 8 | 10 | 12 | 14 | 16 |
SealSkinz Socks

| Size | Small | Medium | Large | Extra Large |
|---|---|---|---|---|
| UK Size | 3-5 | 6-8 | 9-11 | 12-14 |
Footwear
Men's Footwear
| UK Size | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| European/Continental Size | 38 | 38.7 | 39.3 | 40 | 40.5 | 41 | 42 | 42.5 | 43 | 44 | 44.5 | 45 | 46 | 46.5 | 47 |
Women's Footwear
| UK Size | 2 | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| European/Continental Size | 34 | 35 | 35.5 | 36 | 37 | 37.5 | 38 | 38.5 | 39 | 39.5 | 40 | 41 | 42 |
Overshoes
| Size | Small (S/SM) | Medium (M/MD/I) | Large (L/LG/II) | Extra Large (XL) | Extra Extra Large (XXL) |
|---|---|---|---|---|---|
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5 - 7 | 7 - 9 | 9 - 11 | 11 - 13 | - |
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< 5.5 | < 9 | < 10.5 | 10.5+ | - |
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5 - 6 | 7 - 8 | 9 - 10 | 11 - 12 | - |
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3.5 - 5 | 5.5 - 7.5 | 8 - 10 | 10.5 - 12.5 | - |
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<5.5 | 6 - 7.5 | 8 - 9 | 8.5 - 11 | 11.5+ |
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5 - 5.5 | 6.5 - 7.5 | 8 - 9 | 9.5 - 10.5 | 11.5 - 12.5 |
Gloves
Sizing and the type of measurement used varies between different brands so all of our gloves are converted into similar size ranges. The charts below indicate the appropriate size glove for your hand measurement. Measure around your palm in inches to find your hand size.
| Measurement around palm | 6 INCHES | 6.5 INCHES | 7 INCHES | 7.5 INCHES | 8 INCHES | 8.5 INCHES | 9 INCHES | 9.5 INCHES | 10 INCHES |
|---|---|---|---|---|---|---|---|---|---|
| Women's | - | XS | S | M | L | - | - | - | - |
| Men's | - | - | - | - | - | S | M | L | XL |
SealSkinz Gloves

| Measurement around palm (inches) | XS | S | M | L | XL |
|---|---|---|---|---|---|
| Unisex | 5-6 | 7-8 | 9 | 10 | 11 |
| Ladies Fit | 3-4 | 5-6 | 7 | 8 | 9 |
Body Armour
Follow the body measurement guidelines below and refer to the charts provided to find the perfect fit.
Pressure suits: With the tape level, measure around the fullest part of the chest, just under the arms and around the shoulder blades.
Elbow & knee pads: Measure around your arm or leg where top and bottom of the pad ends. The length of the elbow guards is from the centre of the elbow to the bottom. The length of the knee.shin guards is from the centre of the knee to the bottom.
It's important that you get the right fit, so if you're in any doubt, call our mail order team on 0800 298 8898 or try in store.
Upper Body
| Item | Evo Elbow Pad | |||||
|---|---|---|---|---|---|---|
| Size | SM | MD | LG | |||
| INCHES | CM | INCHES | CM | INCHES | CM | |
| Size of top opening | 9 | 23 | 10.5 | 27 | 12.5 | 32 |
| Size of bottom opening | 8 | 20 | 10 | 25 | 12 | 30 |
| Item | Core Saver | Subgear, Vapor & Assault Suits | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Size | SM/MD | MD/LG | SM | MD | LG | |||||
| INCHES | CM | INCHES | CM | INCHES | CM | INCHES | CM | INCHES | CM | |
| Chest | 36-38 | 91-97 | 44-46 | 112-117 | 34-35 | 86-89 | 36-38 | 91-97 | 40-42 | 101-107 |
| Waist | 31-33 | 79-84 | 38-40 | 96-102 | 28-30 | 71-76 | 31-33 | 79-84 | 34-36 | 86-92 |
Lower Body
| Item | Evo & Kyle Strait Knee Guards | Pro Race Knee Pad | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Size | SM | MD | LG | SM | MD | LG | ||||||
| INCHES | CM | INCHES | CM | INCHES | CM | INCHES | CM | INCHES | CM | INCHES | CM | |
| Size of top opening | 15 | 39 | 16 | 41 | 17 | 43 | 14 | 36 | 15 | 38 | 15.5 | 39 |
| Size of bottom opening | 12.5 | 32 | 13 | 33 | 14 | 36 | 8.5 | 21.5 | 9 | 23 | 9.5 | 24 |
Upper Body
| Item | Back Protection | |||||
|---|---|---|---|---|---|---|
| Size | SM | MD | LG | |||
| INCHES | CM | INCHES | CM | INCHES | CM | |
| Body Length | 59-65 | 150-165 | 65-71 | 165-180 | 71+ | 180+ |
| Item | Bone Arm | Joint VPD Elbow | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Size | SM | LG | SM | MD | LG | |||||
| INCHES | CM | INCHES | CM | INCHES | CM | INCHES | CM | INCHES | CM | |
| Circumference under arm | 7.9-10.2 | 20-26 | 10.6-13 | 27-33 | 7.9-9.8 | 20-25 | 9.8-11.8 | 25-30 | 11.8-13.8 | 30-35 | Circumference of bicep | 8.7-11 | 22-28 | 11.4-13.8 | 29-35 | 8.7-10.6 | 22-27 | 10.6-12.6 | 27-32 | 12.6-14.6 | 32-37 |
Lower Body
| Item | Hip Shorts | |||||
|---|---|---|---|---|---|---|
| Size | XS-S | MD | L-XL | |||
| INCHES | CM | INCHES | CM | INCHES | CM | |
| Waist Circumference | 28-30 | 31-33 | 34-36 | |||
| Item | Bone VPD Leg Pad & Joint VPD Shins | |||
|---|---|---|---|---|
| Size | SM | LG | ||
| INCHES | CM | INCHES | CM | |
| Centre ankle bone to centre knee cap length | 13.8-16.9 | 35-43 | 16.9-20.1 | 43-51 |
| Item | Joint VPD Knee | |||||
|---|---|---|---|---|---|---|
| Size | SM | MD | LG | |||
| INCHES | CM | INCHES | CM | INCHES | CM | |
| Circumference of calf | 11.8-13.4 | 30-34 | 13.4-15 | 34-38 | 15-16.5 | 38-42 | Circumference 10cm above centre knee cap | 14.6-16.1 | 37-41 | 16.1-17.7 | 41-45 | 17.7-19.3 | 45-49 |
Kids
When you buy a new bike for your child, consider getting them a new helmet at the same time because if they've outgrown an existing bike, the chances are that the current helmet will be too small.
We also recommend that you buy a bike that your child can ride safely now, rather than getting them one they'll grow into.
Kid's Bikes
The size of the wheel denotes the wheel diameter of the bike and this roughly relates to the age of child that the bicycle is suitable for.
Please note that this information is to be used as a guidelines - we recommend that you visit one of our stores for the best fit. For further information regarding our kid's sizing, give our mail order team a call on 0800 298 8898
| Size | 12" WHEEL | 14" WHEEL | 16" WHEEL | 20" WHEEL | 24" WHEEL | 26" WHEEL | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| INCHES | CM | INCHES | CM | INCHES | CM | INCHES | CM | INCHES | CM | INCHES | CM | ||
| Approximate Age | 2 - 4 years | 3 - 5 years | 5 - 7 years | 7 - 9 years | 9 - 11 years | 11+ years | |||||||
| Rider Height | 2'10" - 3'4" | 85 - 100 | 3'1" - 3'7" | 95 - 110 | 3'7" - 4' | 110 - 120 | 4' - 4'5" | 120 - 135 | 4'5" - 4'9" | 135 - 145 | 4'9"+ | 145+ | |
Kid's Helmets
Please note that we are legally unable to refund or exchange helmet returns so please be careful when choosing.
| Size | Small/Medium | Medium/Large |
|---|---|---|
| CM | CM | |
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46-52 | 52-57 |



Kids












