Joby UltraFit Sling Camera Strap $14.99 @ B&H or Amazon

B&H lists the size as M-XL (free shipping)
Amazon lists the size as S-L
Joby lists the size as M-XL
They are the same item.
B&H
Amazon
Product Highlights
Works with DSLR, CSC, Super Zoom Camera
Designed for Instant Access to Camera
1/4"-20 Thumbscrew Fits Tripod Socket
SpeedCinch Stops Bumping, Swinging Drops