I'm average size (5'3 - 130 lbs) and got medium but don't think the size would make a difference. I didn't care for the clingy fabric or the shapeless way it hung on me. A robe should either be sexy or comfortable. this robe is neither. And it's definitely not "spa quality".

I’m 5ft 3inch and 170lbs with hour glass shape and I reordered the xtra small. I originally ordered the small but There’s so much fabric and stretch and I wanted it a little shorter so think the xtra small will be better

Loved it so much that I purchased a second robe in another color. The fabric is soft with a little stretch. Washes well without any color fade. Comfortable and flattering.

I wanted something short, since I'm 5'2", this goes to mid-knee for me. The material is super soft and great for the summer time.

I can’t even put into words how comfy and light weight this robe is. It is just the right length and the material is soft and comfy

This robe is amazing, you can wear it in the summer all day long at home. Very nice fabric, smooth touch and stretchy enaf. I like this robe and I am thinking to bay another colors.

Love the fabric. It states "lightweight", which it is in the sense that it is not a thick material or heavy on the body like a towel robe, however it does have stretchy weight to it which keeps it from blowing around. I am 5'5" and measure 37/29.5/41.5. My backside is a smidge larger than average and the medium hits mid thigh with great coverage. Arms do reach the elbows. I could have gone with the small.My only complaint may end up being not withstanding the "hand wash" setting in the washer…