White STARBUCKS Mermaid Siren Ceramic/ Silicone Lid Travel Mug with Handle 16 oz The cup is wider at the bottom than the top. 3-7.8" width at bottom and 3-1/4" inches at the top. The cup has no defects, is clean, and no stir marks. The cup rim is thick, and is meant to be used with the lid. This cup weighs 1# 4 oz.