about 8 inches by 1 foot, it is compact for easy storage(it fits in your purse if you have a large enough purse). the fit is very secure even without a strap over your head to keep it in place. the bubbles got clogged once in a while. (or, at the very least, things that i have a good chance of finishing.) we are not a fly-by-night operation. getting closer i saw daylight through the underside of the stone – it must resting on rock. 