noun
Refers to a clothing size larger than LL (XL), equivalent to XXL in Western sizing. Used in Japanese fashion and retail.
このTシャツの3Lサイズはありますか?
Do you have this T-shirt in 3L?
彼は体格がいいので、いつも3Lの服を着ている。
He has a large build, so he always wears 3L clothes.