Originally Posted by justplaincharlotte
I'd think it depends on your crochet gauge.
But I'd say try a G hook, and see how crocheted sl st in each knitted st works. On shoulder seams I'd be a bit wary of crocheting in anything less than 3 out of every 4 knit stitches because you need a firm seam.
If you don't like how that works, frog the seam and change hook size.
I am only doing sleeve seams. It's a top down sweater so everything else is seamless.
Thanks for your help.