I am very pleased with this cover up - it fits perfectly and looks terrific on. I used the sizing guide and ordered an 18/20 (I'm 5'6", weigh 205 lbs, and wear a 38DDD bra). Looks like it was made for me! It is 100% cotton, so I'll have to make sure it doesn't end up in the dryer. And it will need an initial ironing to get rid of creases from the packaging, but I hope will be okay after that (I hate ironing!).