Having a medium or intermediate size

Of intermediate size.

Of a medium size

A car of intermediate size.

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.