Depends somewhat on whether you've washed them in hot water, I'd think... my 1947s have been washed around 8 times over a couple of years (not worn constantly, but about 9 months of that would have been daily wear), always cold washed in the machine and usually run through the dryer afterwards. After the first time, I went from a double cuff to a single. They usually feel pretty snug when first out of the dryer... like, if-they-were-a-new-pair-I'd-be-looking-for-a-size-up snug. But they settle in within half an hour.
So, I would say if you haven't lost about an inch in the legs through your current washing routine it'll probably happen when you put it through the dryer.
And your patch will become shrunken, cracked and distorted—at least, mine did; I've just received a new pair so will have to see if it happens again. In my experience most Sugarcane patches don't fare too well in the dryer... I have Okinawas and Hawaiis with patches in great condition, but I don't think I've had them in the dryer. The 47s, 66s and a persimmon-dyed pair have all got damaged patches, but to be fair the last two have paper patches.
Images have been posted before in this thread I think... from mid-2016; since that time the patch has aged, but not much additional evolution as I like them this way.