I WAS WORRIED 'IF' THEY MAY BE SLIGHTLY LOOSE BUT THAT IS NOT SO =A NICE TIGHT FIT SO THEY WILL NOT MOVE UNLESS I MOVE THEM. I THOUGHT THE BEAD SHAPE WAS ODD BUT HAVE FOUND THEM VERY ERGONOMIC; AS THE SHAPE AIDES PULLING & PUSHING IN A LINEAR DIRECTION ALONG THE DOUBLE CORD. FOR £6.49 ITS CHEAPER THAN BUYING MY OWN BEADS & CORDS. AS I DISCOVERED BUYING THE RIGHT BEADS ONLINE IS VERY COMPLICATED WITH SIZES,AMOUNTS,SHAPE APPEARANCE. SO I WISH I HAD BOUGHT MORE THAN ONE SET OF PACECOUNTER BEADS = THE RULE OF THREE =ONE IS NONE,TWO IS ONE & THREE IS TWO............BECAUSE UNLESS YOU SECURE THEM TO SOMETHING PERMENANT THEY WOULD BE EASY TO MISPLACE OR LOSE BEING TINY,GREEN & BLACK EG IF YOU DROPPED THEM IN GREEN GRASS OR BUSH OR VERDANT OUTSIDE AREA. A VERY USEFUL THING TO OWN.