Being the size of a twin bed.

Small enough to be eaten in one bite / (by extension) Broken down into small pieces that are individually easy to understand or manage

bite-sized

(idiomatic) To evaluate; to estimate or anticipate the magnitude, difficulty, or strength of something. / To wear a larger size of clothing.

(colloquial) Of a reasonably large size.

(colloquial) Comparatively small in size.

(US) The smallest size of women's clothing / (informal) A woman with a very low body mass index, especially such a fashion model

(idiomatic, slang, originally LGBT, sometimes derogatory) Someone who prefers sexual partners with large penises.

(of any representation, especially pictures, statues) The same size as the real thing.

the size of that part of a bra that holds the breasts