Lemme just wait here yk- ╮(￣▽￣)╭
Have you read XXX Allergy and XXX Secret?
The author is famous for Therapy Game, but I recommend reading the XXX series first because the characters from Therapy Game are introduced. Each are about 8 chapters (or less) long, characters have similar builds, and the art is so pretty. I recommend reading everything from Hinohara Meguru Sensei.
http://www.mangago.zone/read-manga/xxx_allergy/
http://www.mangago.zone/read-manga/secret_xxx/
Golden sparkle (idk abt same body sizes tho)
Any like short BL? Or a BL where the uke and seme have similar body sizes? Ty! (๑•ㅂ•)و✧