Traditionally, you would receive a key to the door on your 21st birthday - making this beautiful 9ct yellow gold small key charm an ideal milestone birthday gift for the modern woman of today. Featuring the number 21, it is a brilliant keepsake of the day and can be added to any of our necklaces or bracelets. It has a 2D finish and measures 20 x 7mm. It weighs 0.4 grams and is also available in 9ct rose gold.