Brass candle holders are specially made to fit in our Waldorf Celebration Ring to prevent the wooden candle holder from candle drips & possible fire. Best for festive celebration uses too. Sizes of one brass candle holder are : Inner diameter is 14mm (suitable for candles of max 14mm diameter) Outer diameter is 15mm (fits in 16mm diameter wooden ring holes) Depth of candle holder's hole is 15mm, Total Height of brass candle holder is 16mm. Please note that Sizes are in Millimeters! Please also note that our brass candle holder may not be fitting to your celebration ring produced by others, therefore please Re-Check the sizes/measurements before you place the order. Wooden celebration ring is listed seperately. The one meeting is with 16mm diameter holes, link is below. https://www.etsy.com/listing/1019404340/wooden-celebration-ring-candle-holder Links of Cake & Numbers Set in Video are below: Cake: https://www.etsy.com/listing/1332647374/natural-wood-blossom-birthday-cake-gift Numbers Set: https://www.etsy.com/listing/1416731975/natural-wood-number-set-wooden Brass Candle Holder, Waldorf Birthday Celebration Ring Cup, Inserts, Metal Cups, Christmas Easter Home Decoration