Huge. The Small says 6-10 on the label.  That's Medium in the USA.  I'm a size 2-4 (5'4") so it's very long and wide on me.  But the material is soft and has a really cute cat pattern.  Unfortunately, they don't make this in an XS.  I'll keep and get altered as it's hard to find cozy summer nightgowns nowadays. Especially for $14.99.