Try a Dry Cut If:
A Your hair is long. "Women who have long hair and want to keep their length intact should definitely get a dry-cut," Buckett says. "Hair shrinks when it's wet, so the amount the stylist is removing might be deceptive."
Your hair is curly, fine, or wavy. "When clients have wavy or curly hair, or lots of cowlicks, I always recommend a dry-cut" says Buckett. With a dry-cut, the stylist can plainly see what he or she is dealing with, how the hair falls, and where the weight is distributed.
Your hair is looking weighed down. A dry-cut is the best way to remove weight and add texture without significantly changing the shape of the cut.
Try a Wet Cut if:
You want to try something new. "The stylist has more control over wet hair," says Buckett. "It's easier to craft an entirely new shape when the hair is holding still."
You've had several consecutive dry-cuts. "A wet cut is necessary once in a while because too many dry-cuts in a row can leave hair stringy," says Buckett. A wet cut is great for freshening and evening up the ends.