I have a new pair of slippers: Sherwood Slippers.
They are a little less structured than some of my others, but I really like them. I decided I wanted to offer sizes, this time. They go from women's small to men's large. Knit on large needles, they are a super-fast knit. (This is good, since every relative who has seen a pair wants some.)
I sent the pattern out to testers and got some notes back - the slippers were unusually large. Like, maybe a whole size larger than I meant for them to be. The ones I knit, in women's medium, fit my size 8.5 feet and Dee's size 6.5 feet (with socks), so I couldn't figure out what was wrong.
I popped open the spreadsheet and fiddled with numbers. I had accidentally figured out the circumference needed for the slippers by using the length measurement. Whoops! No wonder they were too big. I worked up some revisions and will try again...