All the 3 clear tubing are 10 feet (3 meters) length and 1/24 inch (1mm ) thickness. The inner dimensions and outside dimensions are: 6mm ID x 8mm OD ---- ca. 0.24" ID x 0.31" OD ---- 1/4" ID x 5/16" OD 7mm ID x 9mm OD ---- ca. 0.28" ID x 0.35" OD ---- 9/32" ID x 11/32" OD 8mm ID x 10mm OD ---- ca. 0.31" ID x 0.39" OD ---- 5/16" ID x 3/8" OD