Click on paternsand it shows a choice of patterns. I went down to babies and there quite a few dresses.

I did this back in the '70's for my daughter. One dress I did had a pinafore that I did in the velvet. To find a dress
that is suitable for that type of fabric, try to find very old patterns. Back then it was the style but not so much
today. Places like this: http://lanetzliving.net/home
She carries out of print patterns.

You could look for dolly dresses, in that size.