John Elliott said that this seasons escobars runs tru to size, so you dont have to size up, so I believe this size M is equal to last seasons escobars in L, so I went for M, comparing to the model on their photos who was wearing M in previous model, so suppose he would wear S in new model. And as I am the same high as him - 5,9" and about 20lbs havier I want for M. I hope they won't be too tight as I have pretty muscular legs.
For what it's worth, if the new escobars fit like the kith Lima sweats a small will fit you fine. I have those in a small size 30 waist and 5-8. They fit me relatively loose, not like jeggings.