I made this collar to wear with my mint top. Being a removable collar, I can wear it with all my tshirts, too. I really like how adding the collar to jeans and a tshirt updates it from jeans and a tshirt to an outfit.
I drafted the pattern myself, and put it together following the tips I found in my 1960's Better Homes and Gardens Sewing Book. It closes in the front with a simple hook and eye. The next time i make one I think I'll look into doing a button instead, just to be more sure of it staying in place.
Some time this week I'll hopefully be posting a guide to drafting collars without tracing existing collars.