This LUMB BROS DIVERS WRITING SLATE is the perfect size for your pocket, measuring 5" x 4". Made in the United Kingdom and not modified in any way, it's a reliable tool for any scuba or snorkelling enthusiast. The slate is perfect for writing important notes and information underwater, ensuring you don't forget any important details during your dive. The brand LUMB BROS is known for their high-quality diving equipment, making this writing slate a great addition to any diver's gear.