The most common size of qualatex twisting balloon used is the 260Q. Twisting balloons are measured by the inflated size, so the 260 is 2 inches in diameter thick and 60 inches long when inflated. Qualatex twisting balloons are preferred by balloon sculptors such as clowns who make balloon animals. See below as balloon twisters use 260Q balloons.So 160q balloons are 1 inch inflated diameter by 60 inches long inflated