Hand Held Bowls Comparative Measure. A small flat hand held measuring device, made from clear durable material with a number of circles drawn with increasing circumferences outward from a small hole through the device in the centre of said circles (which may, or may not have cross hair lines marked upon them). The device is held directly over the top of the jack enabling comparative distances of any number of bowls surrounding the jack to be quickly estimated. The overall dimensions of the device are approximately 115 millimetres (mm) by 95mm with an approximate thickness of 5mm.