CO 30 sts.
Divide sts between needles and join to begin working in the round, being careful not to twist.
Round 1: [K2, p1] to end.
Round 2: K all sts.
Repeat these 2 rounds until work measures 5 inches or desired length.
Note: Binding off as described below creates a stretchy, slightly flared, bumpy edge.
BO Round: K1, [slip st just worked from right needle back to left needle, k2, pass first st worked over second st] until 1 st remains. Break yarn and draw through last st.
Make a second ankle warmer in the same way.