Those of us who know, just know. The all cotton Lands’ End nightgown is a must have. It’s the only nightgown I will sleep in, but, I did get a little overzealous with my collection. I’m just thinning out the herd. I buy them used, they never die. This particular one is of the heavier variety. Measurements laying flat: Chest 23”, length 46” (I’m 5’7” and it comes to a bit above my ankles) sleeves from shoulder to cuff: 23”