Comb coils or gel twists are a great and easy way to begin your loc journey or experiment with starter locs on short hair. I would not recommend using coils to start locs on hair that is longer than 4 inches.
The best product to start your locs with comb coils is an aloe-vera gel based locking gel. You can learn how to make this gel in the “Natural Locking Gel Workshop“. This is the result of the comb coils on short hair:
Have you ever tried comb coils on your hair?