Im 58 165 lbs - absolutely love this robe... purchased the next size up as wanted it BIG... well it was!  Kept it, ordered L - XL in a different color... fit is great. Different materials!  The 1X-2X definitely heaviest. Dark purple L-XL a lighter weight. This is fine for me because I live in So AZ - its Feb 3rd 11:40 am & 80 degrees outside.