Castelli Nano Flex arm warmer sizing?

Anyone have these arm warmers who could help me with sizing?

I’ve got puny biceps (33 cm flexed!) but I’m also lanky with 60 cm length arms (measured from pit to wrist bone)

Castelli website does not provide any sizing guide but some retailers seem to suggest sizing by body weight for some odd reason.

TIA

Hi Vlad

It sounds like you’re very similar build to me. I’m 185cm and 71kg so, tall and skinny. It has taken me years to find a pair of arm warmers to fit that don’t fall down mid ride. Medium Nano Flex warmers fit a treat and stay in place. The warmth and water resistance is pretty good too.

I reckon the Castelli Medium is perfect for me for all of their clothing, it’s great when you find a brand that fits you. I’d love to support a local company like Endura but their fit is just wrong for me.

I wear a long sleeved base layer instead under the jersey. Arm warmers just fall down. I do not lift weights.

I’ve skinny arms, bought the medium arm warmers as the size guide suggested I was a medium in their tops. I’m 5’9 and around 75kg. The top fits well but the arm warmers are a little long. No problems with falling down, even on my scrawny arms.

I find Castelli are sized for roadie racing snakes – so buy with that in mind. I am an L in most gear, but for Castelli I have to go 2xl or 3xl

I find Castelli are sized for roadie racing snakes – so buy with that in mind.

Castelli’s sizing is all over the place. There are no Castelli suppliers in my locality so only really get to try it on when I’m on holiday and I remember laughing when I picked up a XXL jersey at a shop in Girona as it seemed tiny.

Yet I recently bought a Gabba mail order in XXL and had to send it back as it was way too big. I replaced it with an XL which still seems a little odd fit but I’ve not had the opportunity to try it on the bike yet as weather has been miserable…

I’d love to support a local company like Endura but their fit is just wrong for me.

Their sizing is wrong for themselves.