You can customize with anything! Just email us if you have any question in mind.Our [link removed, please contact seller] are manufactured with great design and they are comfortable to use.The engraving area is 1.5 cm by 5 cm = 5/8 inch by 2 inch approximatelyThe keyring has diameter of 2.5 cm = 1 inch approximatelyThe hardware is 2 colors and they are called black and silver like shown in images.You will love the smell of our products, they smell all natural :)Please Note: Our products are handcrafted from full grain distressed leather. Since it is a natural product it may seem different in color, surface and in other natural dimensions. No two of them are alike and each one is unique. You have chosen full grain leather for these reasons :)Individual Free gift box/pouch is always included for your engraved items :)The gift box color maybe different according to available stock but the shape and size will be the same!We ship out in 1-3 business days, we are very fast but if you want to rush more, please purchase RUSH THIS ORDER from below listing:[link removed, please contact seller]PRODUCTION AND SHIPPING TIME. ♦ Production time is 1 - 2 business days.. ♦ You will have an unique item. Because our all products are Custom, Handmade and Made to Order.. ♦ Shipping takes 1 - 3 business days for U.S.. Please note, Free Gift Box or Pouch is for each engraved item, blank items are not eligible for individual gift boxes, they will be packed together if purchased multiple quantity.