This is a pack of Large Heavy Duty Black Rubber bands. They are size number #81. They measure approximately 2"x1/2". They are UV and heat resistant and very thick. Perfect for fishing but are also very versatile for every day use. These will last over ten times longer than standard rubber bands. This is for a pack of Quantity 10. 

Specs: Band width = 1/2"
Flattened length = 2"
Thickness = 1/32"

Feel free to ask any questions. Thanks!