Below are the typical sizes of heavy duty 41" loop resistance bands. 1/4": 5-15 pounds of resistance (1/4" - 41" x 0.5" x 0.18") 1/2": 5 to 30 pounds of resistance (1/2” - 41" x 0.5" x 0.18") 7/8": 20 to 55 pounds of resistance (7/8" - 41" x 0.85" x 0.18") 1 1/4": 35 to 70 pounds of resistance (1 1/4" - 41" x 1.25" x 0.18")

Loop bands: 40” to 41” long which means 80” to 82” total circumference. Mini bands: 10” to 12” long which means 20” to 24” total circumference. Therapy bands: 5 feet long. Some are slightly longer or shorter but stay within 1” of 5’ Tube bands: 48” long without attachments.