Key chain details: ♥ Base metal key ring ♥ Stainless steel pill holder: Outer dimension is 20mm x 63mm Inner size is 17mm x 48mm ❤️ Fits 12 small ibuprofen tablets ♥ Due to the size of the pill box, we can only engrave 1 line with up to 20 characters including spaces, thank you ♥ Please include the engraving information in "Note to Seller" box at checkout. Thank you ♥ Please note that the longer message you have, the letters will be smaller on the stainless steel bar, thank you ♥ Engraving position will be Horizontal ♥ Please clean the pill holder with q-tips before using it, thank you ♥ Please feel free to contact me if you have any questions, thank you ♥ Thank you for visiting! ♥