I make adjustable ones. Going to try a differnt design this year. THe same one 5911 ryan off of youtoube makes. I always found my other ones were too tight in the neck so im thinking these will be the magic ticket
I would always advise using a stretcher that follows the sizing guidelines.
I also think that if you think a buyer won't notice that yours are a different size and not mark it down in grade, you are kidding yourself.
but, to each their own. I just know that i spent a lot of time getting it to market and don't want to give them any reason to deduct from my product when it comes time to finally get paid.