Avery 5160 and 5260 are both 1" x 2 5/8" in size and share the same template and are only compatible with laser printers.
The only difference is the quantity of labels included in each pack. 5160 includes 3,000 labels in a pack and 5260 includes 750 labels in a pack.
The 5160 template is comparable with many Avery labels that are in a 1" x 2 5/8" size. You can check compatible templates at avery.com/match