Ideally, it should be half a size greater than your neck, looking at the shrinkage in cotton garments. For those who have plenty of Area to glide 1 or 2 fingers among your collar and also your neck, it’s best. Hi Tug, Tried the mock turtle but prefer the thinner https://vivushirt.com/product/zio-lovedoveclarke-i-holla-for-collards-shirt-t-shirt-hoodie-sweater-long-sleeve-tshirt-and-tank-top/