I was looking for a boys size 18, I only saw adults, any tips how to locate the boys sizes?
Don't make(At least at this time they never stocked or sold kids clothing.), like mentioned previously go for the smallest size and slimmest..
How do i indicate that i want replacement. I do not see any column for replacement on prepaid label?
On your return slip there is a place to mark off what you want to return or replace, just stick a piece if paper inside together with the shirts you are returning and write what you want, or if you want an official paper from CT then call them to email you a return form, but in general you can put your own piece of paper with all the info you want them to know, and they can and will determine how old these shirts are and if they are covered by the warranty.
And regarding your original question,the return label is for the shipping and not used to mark off on there if your exchanging or returning.