I actually made this twice, as the first time I used size 5 needles and it came out too big.
Switched to size 4 needles (smaller for collar) adn it came out lovely.

Only downside is that when my mum wears it and moves around the collar tends to ride up and the whole pullover doesn’t sit properly anymore. Not sure if this is due to any mistake I might have made (picked the wrong size or the wrong needles) or if it is just the pattern.

If I can’t fix it I might frog it (again!) and make the cardigan version.