Most sock knitters have a favorite or “go to” heel when knitting socks. Mine is usually heel flap and gusset but, when trying to use contrast yarns for the heel flap, cuff and toes with a self-striping yarn, it bothers me that for the gusset the stripes end up narrower than in the rest of the sock and short row or after thought heels just don’t fit me. Here is a solution, a sock with a heel flap but no gusset.

Sized from baby/toddler through very wide adult foot.
Knit top down from the cuff to the toes
To ensure matching stripes of smaller amounts of MC, re-wind yarn into two matching cakes and switch to CC when needed.
Instructions are written for sizes as 1 (2, 3, 4, 5, 6)
If only one number is provided it applies to all sizes