A techo cover featuring “Frederick,” the globally beloved classic picture book by Leo Lionni. Features an illustration of Frederick and the field mice discussing colors, printed on glossy enamel material. The bookmark charms are inspired by the fragments of colors and words that Frederick collected. A field mouse is also hiding inside the back pocket. It features “butterfly-stopper” pen holders that double as a clasp to keep the cover shut.

Copyright 2026 by Blueandyellow, LLC Licensed by Cosmo Merchandising

This cover is sized for the A5 Hobonichi Techo Cousin. Pair it with the A5 English Cousin Book refill, sold separately.

Pair it with a matching pencil board, sold separately.