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Short hair has less to grip, but combs still work — here are 9 pieces sized for bobs and pixies.
My top pick: Short hair needs small, light combs placed where there is enough length to hold — usually the side or just behind the ear.

1. Mini Decorative Comb

A small comb scaled to short hair. Shop mini decorative hair comb on Amazon →
2. Side-Sweep Comb

A comb holding one side back. Shop side sweep hair comb small on Amazon →
3. Behind-the-Ear Comb

Tucked where hair is longest. Shop small hair comb behind ear on Amazon →
4. Pearl Mini Comb

A tiny pearl piece for events. Shop mini pearl hair comb on Amazon →
5. Double Mini Comb Set

Two small combs worn symmetrically. Shop mini hair comb set two on Amazon →
6. Bobby Pin Combo

Pins to supplement a small comb. Shop decorative bobby pins set on Amazon →
7. Bob-Length Placement Tips

Where a comb actually holds in a bob. Shop hair comb bob hairstyle on Amazon →
8. Textured-Grip Mini Comb

A grippy finish for short slippery hair. Shop non slip mini hair comb on Amazon →
9. Hair Clip Alternative

A small clip when a comb will not hold. Shop small decorative hair clips on Amazon →
The bottom line
A mini comb placed behind the ear is the most reliable short-hair option. Pair it with a decorative bobby pin so it has something to anchor against.