fender medium jumbo fret size
1 6230: The smallest fret wire found on older Fender necks (.078â³ x .043â³). 2  6150: Vintage jumbo. Much wider but not as tall as 6230 (.102â³ x .042â³). 3  6105: Modern narrow and tall; currently very popular (.090â³ x .055â³). 4  6100: Jumbo. The largest fret wire available (.110â³ x .055â³).  6130: Medium jumbo (.106â³ x .036â³).