The base is made of black saddle leather, and the pen loop is made of dark brown vegetable-tanned leather, hand-stitched to create this handmade, genuine leather pen holder refill for Micro 5 (M5) size. The stitching color is dark brown. *This listing is for the pen holder refill only. Notebook and ballpoint pen are not included. **Size Feel** For photography, we used a "uni-ball one P (W13.9×D19.2×H116.8mm)" and a "Pentel ENERGEL (W11×D16×H147mm)". It can be used with pens up to approximately 14mm in diameter. *Images 7-10 are for illustration purposes only. **Leather** Saddle leather (neck). Finished with neatsfoot oil. --- ● Size: Outer dimensions Height: Approx. 10.5 cm Width: Approx. 6.4 cm Width (pen loop part): Approx. 8.5 cm ● Quality As this is a natural material, there may be scratches, tiger stripes, and stains on the surface. Please understand this in advance. ● Material Cowhide (vegetable-tanned) --- *This is a handmade item, with all processes done by hand. Minor scratches, wrinkles, and stains inherent to the leather, as well as small marks from the crafting process, are not considered defects. Please consider purchasing with your understanding and consent.