Product size about : Dial: 6.5cm/2.5in Strap: 37cm/14.5in Thickness: 3.6cm/1.4in Product color: As shown in the figure Product material:ABS product features: The diving compass font scale is clear, easy to read data, and the product can dive to a deep water of 50 meters. There is also a visible window on the side of the dial, and the maximum tilt Angle of the dial can reach 30° for easy aiming. After 30 minutes of light, the dial can be used in the dark. In order to avoid the occurrence of pointer confusion, please stay away from magnetic, current and some metal products. Keep the level state as far as possible when using to ensure accurate reading. Uses: diving, mountaineering camping, outdoor cycling, navigation pointing, self-driving cross-country, low quality exploration and so on. Precautions: 1. As we know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can contact us at any time. We will give you some suggestions, but for your reference only. Shipment includes: 1 pc Diving compass