MELOTOUGHOutback Side Clip Trucker Suspenders/Perry Suspenders with 2inch Width Elastic

Hi. i have 2 questions if anyone could help. first, confirming what color are they? second, confirming do they have belt loops or pant clips? thanks.

Are these considered one size fits all?

Can these be worn underneath a shirt?

Do these come in other sizes like XXL?