For a look that's pretty and polished but not overly fussy, try this loose bob. The secret: Use a curling iron—instead of a flatiron—to smooth just-blown-dry hair. This delivers a super-straight look with a slight arc at the ends. Lightly teasing the hair just above the forehead creates a secure anchor for a small hair accessory, such as a narrow crystal comb.

Hair comb with sterling silver and Swarovski crystals, Cheryl King, $450; 919-365-4462. 18kt-white-gold chain with topaz pendant ($2,520) and 18kt-white-gold-and-topaz necklace ($3,540), Scott Colee; 800-937-6379. Silk crepe and chiffon gown, Robert Danes, $2,990; 212-319-6778.