Martin use a narrower saddle slot than Gibson. The 108mm blanks are suitable for both vintage cut-through bridges and modern drop-in saddle slots.
Shorter saddles are suitable for drop-in style bridges only.
Guitar saddle blank, Martin style, unbleached bone
108mm x 11.9mm x 2.4mm
£
Guitar saddle blank, Martin style, white (bleached) bone
108mm x 11.9mm x 2.4mm
£
Compensated saddle, Martin style, white (bleached) bone
72.12mm long x 2.86mm wide
Height over 1st string: 7.79mm
Height over 6th string: 8.48mm