Based on this product's specifications, here are some alternatives and similar models
Paper index tabs Centrum 20×50 mm neon, pack of 50 (model 85385)
Summary description:
Paper index tabs by Centrum, size 20×50 mm, neon colors, model 85385. Pack contains 50 adhesive tabs suitable for marking pages, organizing documents, and color-coding files. Thin paper tabs provide writable surface for notes and labels. Designed for use in offices, schools and home for quick referencing and document navigation.