Cosima, the Woodpecker A classic woodpecker door knocker design known as Cosima. Dimensions: Length: 200mm, Width: 60mm, Depth: 70mm Top bracket: Width 25mm Knocker stop: Width 37mm Material: Brass Weight: 620g Our door knockers are handcrafted so there may be some minor variations to the images. Each piece is truly unique, engraved with our trademark and finished to order. It is presented in a complimentary wooden gift box. Please select your finish. Scroll down for information on finish options.