Patchwork Ruler Kaleidoscop Half Square NEON. According to the ruler, you simply create a kaleidoscope of halved squares. Block size 4.5 "and 6.5" inch. With a 6.5 "size, you can choose to have a kaleidoscope cut off or a square in its entirety. Related items below. VIDEO - MANUAL On-line na Facebooku. CLEAR/NEON choose.