In my auntie era

Turn around time is 20 business days as these are made to order. 

All tshirts are a Bella Canvas Heather blend of Polyester and Cotton 

Crewnecks are Gildan Unisex are 50/50 Blend of Polyester and cotton. 

Tshirts and Crewnecks may be a shade or two different due to different brands 

Both Crewnecks and tshirts are unisex that fit true to size. 
if you are wanting the oversized look make sure to size up.