Looks very hole-y. Too big of needle or not tight enough stitching? Using 6mm but think 5 would be better. Used yarn so doesn't say which to use. 😔 : r/knitting
How to Knit With Circular Needles
Does using larger knitting needles use less yarn? - Quora
Gauge issues - the pattern suggests 4mm needles but I can only get the right stitch gauge with 3.25mm and it's still a little too long row-wise with 3mm! What am I