Doesn't hurt to try it.

Initial purchase a couple of summers ago, was a Nalini sleeveless.
Fit was ok, but way too long.

That recently wore out, so I purchased an Assos summer sleeveless from the same shop.
Way better fit/length, but more thicker than the Nalini. But I love it.

Assos has 3? sleeveless models, depending on the season.

I suppose the main reason I wear them is to keep the sunburn away.
Although my summer jerseys are rated UV?50, I need all the protection I can get, due to my light skin, and riding in up to 45 degree summer temps.