This pattern is designed as photo prop.
Romper is knitted bottoms up, 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/100g
needles: 6US/ 4.0mm - selection of DPNs & circulars
tapestry needle
buttons 10mm – 4pcs

Skill level required: Intermediate
CO = long tail Cast On method
Figure-8 CO = https://www.youtube.com/watch?v=7LvanJobvjo
K = knit stitch
P = purl stitch
sl1 = slip one stitch knitwise
K2tog = knit two stitches together
ssk = slip, slip, knit two stitches together through back loop
m1L = make one left
m1R = make one right
YO = yarn over
RS = right side of work
WS = wrong side of work
sts = stitches
BO = simple bind off

Gauge: 20sts x 29rows for 10cm x 10cm