Ok, so I've got about 12 threadless shirts. I wear a guy's small, but the only problem is, some of them are way smaller than the size chart specifies.
Some of them fit like a glove, but the few that are too small usually need a bit of stretching, but of course they shrink back after a while (and they start to feel a tad uncomfortable).
I have tried to order a medium, but they are damn huge.
Honestly, the size difference between a medium and a small is just crazy.

Does anyone have any little tips they could share with me on how to get my shirts just that little bit looser?
Are there any old wives remedies I could try out?

Thanks a lot, guys.