I returned 18m-24m and ordered 12m but the double showed 12-18m. So 12m = 12-18m and 18m = 18m-24m. I think it's the same with long sleeve dresses! I bought this dress because I needed a long sleeve white dress which is almost impossible to make in Chicago in January. It came on time but the tulle was wrinkled. I was able to steam out the crease quite easily. The dress is really big and wide. My daughter is 22 months old and I had to downsize. The upper is made from a cotton-poly blend and doesn't feel like a super cheap material. The sleeves are so long. I will shorten them. The skirt is made from a soft cotton-polyester blend lining with a tulle overlay. The lining is much shorter than the lining. The material is thin for a Chicago winter, so a long-sleeved white jumpsuit is needed. The label doesn't say what it's made of (I assumed cotton) and it doesn't say how to wash it. I washed inside out on cold and then on low heat.
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