Free size 

One size fit's all.

"Free size clothes shrink & expand, but sometimes they lie & don't always look so hot."

Free size by Allaiyah June 24, 2004

Free Size 

A t-shirt that comes in only one size, usually two sizes bigger than you actually need.

Said t-shirts can be found outside of concerts, sporting events, 5k runs, charity walks, etc. or any other event where t-shirts are handed out.

I never got a concert tee after the Pearl Jam show because I knew it would only come in free size and those things are 4 sizes too big...all the time.

Free Size by Capt. Awesome July 20, 2008