If you have an XL phone (Apple, Samsung, etc) with a regular SLIM PHONE CASE, then buy the regular CupFone.If you have an XL phone (Apple, Samsung, etc) with a THICK PHONE CASE, then buy the CupFone XL.If you have a regular sized phone, regardless of case size, buy the regular CupFoneDesigned using interchangeable base cups allowing you to customize the perfect snug fit.Take it with you on the golf course! CupFone can also be adjusted to fit recreational vehicles too! Great for use in boats, golf carts and more!Base allows phone to rotate 360°, adjustable for viewing from any seat position.Phone holder tilts with full range of motion to allow proper angle of microphone and speakers. Knob tightens easily and securely locks position.CupFone's adjustable phone holder can fit devices that measure between 2 3/8" to 3 3/8" wide and 9/16" deep!CupFone XL Exact Width Range: 2.86" to 4.11" Depth: 0.67"Open access bottom lets you easily charge your mobile device while it is in place.Can be used in multiple vehicles, or on your desk, and it’s great for rental cars.100% Designed, Engineered, and Manufactured in the USA by WeatherTech!Usually ships by the next business day. Delivery time: 1-5 business days for most locations.