This designation refers to the width of your saddle slot.

Some companies, like Martin, have traditionally used a 3/32” saddle slot, which we call “narrow”.

Others, like Gibson, use a 1/8” slot, which we call “wide”.

Both our narrow and wide Matrix elements measure 2.65″ long.

Split format is for less common instruments made by some companies, such as Lowden, which feature two saddles: a short one for the E and B strings, and a longer one for the remaining four strings. The saddle slot width for our split format is designed like our narrow pickup, to accommodate two 3/32” width saddle slots.  The long element measures 1 3/4″ long, and the short element measures 7/8″ long

If you are unsure which model you need, measure your saddle carefully using calipers, or simply show your guitar to your installer. They will usually be able to see right away which size will fit your instrument.

If there is any doubt, a “narrow” pickup can fit in a “wide” pickup slot and work well, but the reverse is not true.