Size Guide
Free exchange of size or colour within 40 days. We cover the postage both ways.
How do I find my size?
Two measurements decide it, and both take ten seconds with a tape.
Adults: measure your bicep. Put a tape around your bicep with the arm straight and read the number in centimetres, then check it against the sizes below. That is the measurement that decides an adult size.
Kids: measure their height, not their age. Height is a good stand in for bicep width, and kids of the same age vary a lot. There's a rough age guide alongside, but if the height and the age disagree, go by the height.
Length, if you want to check it: measure from the wrist bone to the armpit.
Adult sizes
Check out all 4 sizes from Adult Small to Adult XL (scroll across)
| Size | Adult Small | Adult Regular | Adult Relaxed | Adult XL |
|---|---|---|---|---|
| Best for bicep | 26 cm (10 in) | 30 cm (12 in) | 34 cm (13 in) | 38 cm (15 in) |
| Bicep range | 24 to 28 cm | 28 to 32 cm | 32 to 36 cm | 36 cm and over |
| Length, plain cuff | 41 cm | 44 cm | 44 cm | 48 cm |
| Length, with thumbhole extension | 44 cm | 47 cm | 52 cm | 55 cm |
| Who it suits | For smaller adults or early teens | Fits 70% of the population | For those with larger biceps | For those with larger biceps |
Where two ranges meet, at 28 cm or 32 cm, you're between two sizes, and the section on that further down will help you pick.
Regular or Relaxed?
"Crazy Arms are designed to fit like a second skin for athletic activity. This should feel a little tight on first wearing, but will ease to a snug fit after one or two wears. If you are using Crazy Arms for activities with high arm movement (e.g. golf, tennis, cricket, sailing), we recommend the "Regular" Fit up to a 32cm bicep. This will help ensure the upper elastic band keeps the sleeve in place."
Kids sizes
Check out all 4 sizes from Kids X-Small to Adult Small (scroll across)
| Size | Kids X-Small | Kids Small | Kids Medium | Adult Small |
|---|---|---|---|---|
| Age guide | 3 to 4 years | 5 to 6 years | 7 to 10 years | 11 and over |
| Height | 95 to 115 cm (3'0" to 3'9") | 115 to 135 cm (3'9" to 4'6") | 135 to 155 cm (4'6" to 5'0") | 155 cm and over (5'0" and over) |
| Best for bicep | 16 cm (6 in) | 18 cm (7 in) | 22 cm (9 in) | 26 cm (10 in) |
| Bicep range | 15 to 19 cm | 16 to 22 cm | 20 to 24 cm | 24 to 28 cm |
| Sleeve length, plain cuff | 26.5 cm | 31 cm | 34.5 cm | 41 cm |
The age guide is just that, a guide. Kids grow at very different rates, so if the height and the age disagree, go by the height.
What if I'm between two sizes?
Go by what you'll be doing. Take the smaller size if you want the sleeve to stay put through sport, and the larger one if you'd rather forget you're wearing it on a long day in the garden. It also depends on your arm composition: muscly will be okay with a tighter fit, while a more relaxed fit may be better for arms with a little more padding.
Will they stretch?
They give, they don't go baggy. It's a two way stretch fabric, so the first wear feels close and then settles to snug. Wash them cool, skip the softener and dry them outside rather than in a dryer, and they'll keep their shape for several summers.
How tight is too tight?
Snug is right, tight isn't. If they still pinch or feel uncomfortable after a wear or two, go up a size. If you're pulling them back up every ten minutes, go down one. Crazy Arms are happy to help you with size advice. Simply email at hello@crazyarms.com and they can guide you through it.
What if the size isn't right?
Free exchange of size or colour within 40 days. We cover the postage both ways. Just email hello@crazyarms.com.
Ready? Browse our arm sleeves for sun protection, the kids range, the pre-school sizes or the thumbhole sleeves.