The plastic chain is measured by two numbers, the first number (2" for example) is the length of one link of the chain. The second number (8mm for example) is the thickness of the plastic used in making the chain. The price of chain is per foot. Note: The last link of your chain will be cut with a razor tool. This allows you to add on toy parts and plastic balls. Plastic S-hooks can be used on chain of the same size. Click on the item for more information, such as sizing recommendations. Plastic S-Hook, 1" x 4mm psh4$0.20, 10 for $1.35, 100 for $8.90 Plastic S-hook, 1.5" x 6mm psh6$0.25, 10 for $2.00, 100 for $13.60 Plastic S-Hook, 2" x 8mm psh8$0.40, 10 for $3.00, 100 for $20.00 Plastic Chain, 1/2" x 2mm PC2$0.35, 10 for $3.00Color: YellowGreenHot PinkTurquoise Plastic Chain, 3/4" x 3mm PC3$0.40, 10 for $3.50Color: YellowGreenHot PinkTurquoise Plastic Chain, 1" x 4mm (ft) PC4$0.50, 10 for $4.00Colors: RedOrangeYellowGreenRoyal Blue (Dark Blue)Turquoise (Light Blue)PurpleHot Pink Plastic Chain, 1.5" x 6mm PC6$0.75, 10 for $5.00Color: YellowGreenTurquoise (Light Blue)Hot Pink Plastic Chain, 2" x 8mm PC8$1.00, 10 for $7.50Color: RedYellowGreenRoyal Blue (Dark Blue) Plastic Chain, 3" x 10mm PC10$1.50, 10 for $10.00Colors: YellowTurquoise (Light Blue)Hot Pink Plastic Quick Link, Small PQLS$1.00, 12 for $10.80 Plastic Quick Link, Large PQLL$1.35, 12 for $14.40