There is one check mark that is fairly large. there is a smaller check mark to the right side of the larger one. it is the same length as the first one though.
This Double Tick icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 5,700 icons, all in the same style and quality.