Threw these in the wash and dryer right away and they came out the same shape, no shrinking at all. The elastane gives just enough stretch without sagging by the end of the day, and the one-size fit works fine on my feet.
Avery★★★★★
Wore a pair all day on my feet at work and they didn't slide down once, which is rare for a one-size sock. The elastic band actually holds without squeezing, and they came out of the dryer the same shape.
Sophia★★★★☆
The three pairs fit my size 11 feet without sliding down, and the polyester blend has held up fine through a couple of washes already. Only gripe is they're a bit thin for winter, but for everyday wear they do the job.