This pattern is designed as photo prop.
Trousers are knitted bottoms up, 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: fingering weight (2ply), I have used Drops Nord 170m/50g
Needles: 3US, 3.25mm – selection of DPNs & circular 18” and 32”
Stitch Marker

Skill level required: Intermediate
CO = long tail Cast On method
K = knit stitch
P = purl stitch
LC = Left Cross (also known as C1F = Cable 1 Front = Knitting cable without cable needle) - Knit second stitch on needle through back loop without slipping it off the needle, then Knit first stitch through front loop, slip both stitches off the needle
RC = Right Cross (also known as C1B = Cable 1 Back = Knitting cable without cable needle) - Knit second stitch on needle through front loop without slipping it off the needle, then Knit first stitch through back loop, slip both stitches off the needle
RS = Right Side of work
WS = Wrong Side of work
sts = stitches
BO = bind off, stretchy kind like this one: https://youtu.be/n9nSySyv_BI?si=Aa2_YGXHmo9mgrPc

Gauge:
22sts by 33rows for 10x10cm square