This romper is made to fit the following dolls or dolls of a similar size:
For the 4.25mm hook: Minikane, Miniland 38cm, Kindred Folk and Paola Reina Gordis
For the 5mm hook: Dinkum Doll

Or you could simply use a different weight yarn or hook size to get the right size for a different baby doll.

I include a photo of the gauge in the pattern for the two hook sizes to make sure you’re on the right path for the dolls listed. Gauge is not 10x10cm, so that’s why photos are included to make it easier.

I used 20grams of Paintbox Simply Aran Acrylic yarn, but you could use any other yarn. One of my testers used DK yarn with no problems. Cotton could work too but be mindful of stretch with cotton as it does not bounce back like acrylic.
Also needed are: darning needle to just sew in ends, 15mm buttons if you choose to do a button version, scissors, measuring tape for checking gauge and your chosen hook.