Got a 32" waist n initially ordered large but was big. However I cant say I would recommend these. Its almost a bit like shapewear although very comfy. Got this as a gift and they loved it! Went with a size bigger after reading the other comments and it fit perfectly. Set up was a breeze. The fur material is very thin, albeit soft. I suppose the size of your ear will determine if it will stay in your ear although they should be designed for all eat sizes. I am on my feet all day at work and my feet don?t hate me at the end of the shift. ? Yes, a problem with them sending the wrong size!