Track the tides, your beachcombing finds, or your thoughts as you listen to the waves washing up on shore. At four by six inches, they fit comfortably in one hand or your back pocket.

Each 4-pack contains four different covers: Haeckel jellyfish. Octopus & squid. Shallow seas plate 2. Seaweed. Each notebook has a different type of inside pages: (lined, graph, dot grid, and blank), so pick the one that's right for today's field notes and you're ready for your next adventure.

• Dimensions: 5.8 x 4.1 in (14.6 x 10.5 cm)