Rolller Curl & Stand Up Curl
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A: A roller curl is fairly self-explanatory. It is a curl created by wrapping the wet or product covered hair around a cylindrical tube (usually perforated to allow air to pass through) and allowing the hair to dry.
A stand-up curl (also known as a barrel curl) is created using no "tools" per se. It is one of the non-tool styling techniques we discuss in our styling without tools article. Basically, the hair is wound loosely around the finger to form a barrel shape; the finger is slipped out of the curl and the curl is secured using pins and clips, and allowed to dry.
The Stand-up curl takes some practice to master, but can be useful if you find yourself in a pinch without your usual styling tools.
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See also:
How to style hair
Roller styling techniques
Tips and tricks for hairstyling tools