Popular types of robes:
Beach wrapup a large square or rectangle of fabric usually terrycloth wrapped around the body after swimming or as beachwear fashion.
Caftan (or Kaftan) Moroccan inspired garment similar to a long full dress with slit neckline decorated with embroidery and long bell shaped sleeves. Introduced for at home wear in the mid 1960s.
Dressing Gown -- term used from 1770s to the end of the 19th century for a loose coat like garment made in elaborately patterned silk. From 1850s to 1860s worn for breakfast, after that relegated to the bed and bathroom.
Happi coat A Hip length jacket, made in the Japanese Kimono style of brightly printed fabric. Copied from knee length jackets worn by Japanese laborers. They were popular for beachwear in the 1950s and 60s. Frequently it has a printed medallion on the back in imitation of the original jackets, which had the company logo on the back.
Shave coat mans knee length wraparound, often matched to pajamas.