Details: Size 13" x 13.5" Age Range Newborn Brand Humble Bebe Target Audience Unisex-Babies Material Cotton Lining Description Cotton Pattern Solid they are pre-shrunk, which means the size you think you're getting is the one you still have after several uses and washes. In regards to pre-washing, unbleached cotton may required 6-8 hot cycle washes to strip away the raw cotton oils to prepare it for maximum absorbency. We have already washed the diapers twice, so we recommend washing them at least 4 more times before using them. You will find that they will only get more absorbent as you use and wash them.