这身制服

this uniform

→ 这
phrase Rare #28,430
this uniform 这身 refers to the uniform someone is wearing, emphasizing the whole outfit.
CH: 这身制服穿起来很舒服。
EN: This uniform is comfortable to wear.

你觉得我这身制服怎么样

What do you think of my uniform?

— 乔乔的异想世界 (2019)

你不配穿上这身制服

You don't deserve to wear this uniform.

— 精英部队2:大敌当前 (2010)

我也不想穿这身制服

I don't want to wear this uniform either.

— 风吹麦浪 (2006)

这身制服

Oh, you mean my uniform?

— 黄金三镖客 (1966)