I would say they do. My mare wears an 80 in Schneider's, etc blankets and got the 78-81 I think it is from BOT, in both the sheet & turnout & both fit her good. The only thing is that the sheets usually come with the shoulder gussets sewn down - my mare is too broad for that so just used a seam ripper & took the tack downs out & it's great now.