Rav requires a yarn name,needle sizes, gauge and yardage. I have guessed on most of these. I use hand spun, the needle I use is gauged by folding the yarn in half and finding a needle that is the same width. The gauge isn’t as important as long as you think the yarn is knitting up nicely. You can add or reduce stitches to get the size you want.

I haven’t done a gauge on this pattern but the yarn I used was hand spun in approximately 4-5ply thickness with appropriately sized needles.

Being a top down raglan sleeve you can add or reduce as you like to get the size required easily enough.

Some experience with top down knitting makes this pattern easier.

I have done bobble buttons but you can as easily ignore these and just put buttons in.