This cute little romper is crochet from the top down. There will be one button at the back of the neck to fasten and three buttons for the crotch.

Written in English US terms with abbreviations for UK

Materials
160-370 metres of dk / weight 3 yarn
4mm crochet hook
4 x 15mm buttons

Gauge
9 dc x 4 rows = 2” x 2”

Each size is written separately the PDF is 28 pages with plenty of pictures.

YT tutorial available for size newborn.