[Civitello]

If time counts as a dimension then there's 7-11.

Los of batteries are hmm in some circles purely by their dimensions. 18650s for example.

A4 (paper)

35mm (film)

9mm, 12ga, 22cal (firearms and munitions)

A pint (beer)

A 40 (beer again)

[ChoGGi]

Two four (beer, though it refers to the amount of cans rather than dimensions)

26er (booze)

40 pounder (booze again)

[singleshot_]

Deuce and a half