I've ordered the thong (black and tan) directly through their website twice now. I am 28" waist, 38" hip, athletic build, and the XS fits perfectly. Snug but not too tight or too loose. It's like you can't even feel them on! For reference, I am a M in Boody's Brazilian bikini and a L in Victoria Secret's cheeky panty. I own wool clothing items from many different brands (Ibex, Woolly, Arms of Andes, Branwyn, Unbound Merino, Smartwool, etc.) and it is common for wool clothing to get small holes in them! Do a little repair with some thread and needle and you're good to go! With daily use I only have to repair maybe once every month or so - really not a hassle. Clothing items that are mostly wool (like these underwear) require extra love and attention. I've done jiujitsu, lifting, and running in these and have never felt uncomfortable. Wash in a delicates bag and line dry. They line dry overnight so good for backpacking too!