Handmade genuine leather pen holder refill, hand-stitched using black saddle leather, for Micro 5 (M5) size. Stitch color: Black. Ring hole diameter: 3mm. ※Images 8-11 are for illustration purposes only. ※This listing is for the pen holder refill only. Notebook and ballpoint pen are not included. ＊＊Size Reference＊＊ The photos use 'uni-ball one P (W13.9 x D19.2 x H116.8mm)' and 'Pentel ENERGEL (W11 x D16 x H147mm)'. Suitable for pens with a barrel diameter of up to approximately 14mm. ＊＊Leather＊＊ Saddle leather (neck). Finished with neat's-foot oil. The color and luster will increase with use, allowing you to enjoy the aging process. ーーーー ●Size (Outer Dimensions) Length: Approximately 10.5cm Width: Approximately 6.3cm Width (pen loop section): Approximately 8.5cm ●Quality As this is a natural material, there may be scratches, wrinkles, and stains on the surface. Please understand this beforehand. ●Material Cowhide (vegetable tanned) ーーーー ※This is a handmade item, with all processes done by hand. Minor scratches, wrinkles, and stains inherent to the leather, as well as small imperfections that may occur during the manufacturing process, are not considered defects. Please consider this before purchasing.