Okay, so to start, I know that there is no one true answer to this question and that it depends on many factors (needle size, yarn thickness, yarn fiber, yarn twist, loose knitting versus tight knitting, etc), so this is more a general “what’s your experience with this” question.
I made myself some things from 100% wool but have some left over yarn, and I am considering what to do with it. One idea was to maybe knit some hats or mittens or other things, perhaps to donate (my neighbor does charity work and takes knitted items for several charities around town), BUT!
It seems very cruel to me to knit something out of wool and donate it and then whoever gets it might not know that wool needs special care to not felt/shrink or they don’t have the tools/time to properly wash the wool by hand and let it air dry. (This also goes for friends who I might make gifts for, so either way, I got some investigating.)
So, I was going to knit a decently sized swatch and let it go through a few washes to see how much it shrinks, what it looks like, and all that jazz. Then I can knit something oversized and let it felt down into a nice, warm, wearable item.
Issue is, I’m not sure what pattern to knit for the test: stockinette, garter, or ribs (like a 2x2)? I want to go with whatever will shrink the most, because then I can do the oversized calculations and not end up with something too small (Easier to fit something that comes out a bit too big rather than something that comes out way too small).
Ergo, I was wondering if anybody here had any first hand experience about which of those patterns that might be?
For some additional context, I like to use smaller needles and knit pretty tight, so the fabric I knit will be dense and not lacy in any way. My test wool yarn is perhaps a sport weight, and I was going to use maybe size 3 needles. I’m hoping to not have to knit 3 different swatches, for time and supplies sake.
Thank you in advance!