Cocktail design for sure! 1 3/8" wide. Open cuff. The plastic has been cut and polished, no mold lines. Feels weighty, like Bakelite but, no +color reaction to testing. Much black and red does not. Rigid without flexibility, this piece isn't sliding onto a wrist larger than 6.5. A fun piece for those with smaller wrists who normally can't wear a cuff style. Ca., 1960 and does have a few scratches to note within the oval of stones and the stones are showing their age but, wear it well. A fun authentic period accent piece!