This pattern is designed as photo prop.
Romper is knitted tops down, mainly in rounds on double pointed needles as one piece as much as possible (to avoid sewing pieces together).
Size: newborn (up to 1 month old baby)

Materials used:
Yarn: DK weight, I have used NAKO Calico 245m/ 100gr
Needles: 6US/ 4.0mm – selection of DPNs & circular 32”

Gauge: 22sts x 30rows for 10 x 10cm