I sewed this dress in a size 12 - 18 months for my granddaughter's first birthday. The pattern says to trim 1/2 off around the armhole then sew 1/4 inch around. The binding piece cut from the pattern did not reach around the armhole so I angled the end and sewed on another binding strip. The opening seems large. After the binding is sewn on does it get folded completely back inside the armhole or are you supposed to see 1/4 of the binding on the outside of the armhole? I also sewed her the birthday party dress, in the same size, and that came out as a smaller dress so am I right in thinking that this dress runs big?