THESE LOVELY PET OR KEY TAGS MEASURE APPROX 30MM, THEY COME WITH A STRONG SPLIT RING TO ATTACH TO YOUR PETS COLLAR AND ARE TOUGH AND HARD WEARING AND ARE ENGRAVED FREE ON OUR COMPUTERISED MACHINE WE CAN ENGRAVE YOUR CHOICE OF TEXT AND ALSO SMALL DECORATIVE DETAILS SUCH AS PAW PRINTS, HEARTS STARS ETC - SIMPLY LEAVE A NOTE AT THE PAYPAL CHECK OUT OR MESSAGE US SEPARATELY WITH THE DETAILS FOR ENGRAVING, OBVIOUSLY THESE TAGS CAN ONLY BE ENGRAVED ON THE REVERSE