About 5-1/4 inches long.  Body is just over 1/2 inch square.

Bubble on top is visible via an interior mirror when you sight through the unit.

Sadly, the horizontal pin that should be near the end of the tube is missing.

But the mirror is there, and the level bubble is visible in the view.

Still usable without the pin, but realistically this is intended more as a collector/display unit.

(NO, the ruler shown in the photos is not included)

I can't find a manufacturer name on it, but it looks very similar to units by Dietzgen.

Shipping via USPS Ground Advantage.

Sorry, no returns unless damaged or significantly not as described.

Thanks!