When it's time to bind off your toe-up socks, you have a few options. Here are two of my favorite stretchy bind-offs to try.
Super Stretchy Simple Bind Off
Knitting Socks Archives - A Bee In The Bonnet
Knitting Patterns String-Or-Nothing
Stretchy Toe-Up Sock Bind Off
My Exciting Adventures in Knitting Toe-Up Socks - A Bee In The Bonnet
Super Stretchy Simple Bind Off
Toe up socks, part 3: Cuff and bind off
Binding Off Toe Up Socks - lk2g-043
Perfect Bind Off for Toe-Up Socks and Neck Bands