I bought this for my girlfriend to show off for me and, guys, do it! Girls, your beau will be enticed! Shipping was way fast but it's Amazon we are talking about here! +1 The "one size" works perfect and i was concerned since my girlfriend is 5'1" and 100lbs. I had her try it on and it didn't come off (hint) nor did we want it to-the temperature rose to inferno! She's asleep in this VERY SEXY GARMENT as i write this review. Thank you to the manufacturers and to Amazon!!