Z3R0D 365TRAIN Wetsuit, Size S

This is a wetsuit for triathlons.
It's from the manufacturer Zerod. It's a size S.
I bought it last year and used it in 5 races. From the time I bought it, it felt tight on me, but I didn't have the means to buy a new one, so I used it out of necessity. Now that I've bought a new one, it's no longer needed. I don't see any tears or rips in the fabric, but there is some pilling, especially around the inside of the cuffs, and some oil stains from contact with a road bike chain. Since it's on the lining, it won't be visible while wearing it, but it might be a little bothersome when washing.
Regarding the fit, I am 174 cm tall and weigh 71 kg, and I have a good build. According to the manufacturer's size chart, a size S should be fine, but when I wore it, I felt that someone lighter and with a slimmer build would be better.
If you have any concerns about the photos or would like additional pictures, please feel free to ask questions.
The original price was 40,150 yen.

https://www.zerod-shop.com/?pid=100705818
It's also for sale on Yahoo Flea Market. It's cheaper to buy it there.