Originally Posted by nahneun
your guess is right. attachment is generally tts, but slim. follow chiggah's size guide. if you're somewhere in the middle, it's better to size up.
How can a brand be TTS when it uses a sizing scheme of 1,2,3,4,5? Those are not recognized men's sizes in any country. The only possible reference is a small handful of other Japanese labels like Julius or jun hashimoto that use similar looking numbers. But in my experience those sizes are not safe to compare between the labels. For example, jun hashimoto size 2 fits almost exactly like Julius size 1. And Attachment size 2 fits like Julius 1.5.
As for Attachment size 2 fitting like a 46, I tend to not agree with that either. Whenever I've tried on EU 46 items they fit me like a bag, yet Attachment size 2 has always fit me perfectly. It is true however that many Attachment pieces are designed to fit a little loose, so I could see an 46 who prefers a tighter fit wearing some of them. But I do not believe the designer intended for them to wore like this.
If you have any doubts, check out the posted height and weight of the models wearing Attachment size 2 on many Japanese web sites. They tend to be far skinnier than the models that a store in the US/EU would use when showing a 46 being worn.