How to read size and water ratings
Know which measurements describe the device, the grip, or the packaging.
Compare like with like
Overall length, sleeve depth, and package dimensions describe different things. Match the measurement and unit before comparing. If a listing gives dimensions for a removable sleeve and motor, keep those numbers separate.
Use the exact water rating
Some listings say waterproof without a numerical rating. Others give an IP rating. Follow the manual for the exact model and its charging port. Don’t assume that a washable sleeve means the motor or charger can be immersed.
Check the exact variant
Listings sometimes combine different colors or editions. Match the product image and SKU to the variant you want, and confirm any missing dimensions before ordering.