Sleeveless Black Rouched Waist Knit Dress - Size S - Polyester Blend. Armpit to armpit measures 15". Lying flat the back measures 38" from top of back to hem. Cute simple dress - great for summer! See photos for further description. We are happy to ship items together to save you postage. However, since our items are not uniform in size and shape, we are unable to use's combined shipping tool. Therefore, when you purchase multiple items from us (at the same time) we will pack them, weigh them and charge you the actual postage. If you have already paid, we will refund the difference between what you paid for shipping and what it cost us to send it to you. Questions welcome!