Tortoise Brooches, BirkaA pair of detailed Viking tortoise brooches found in Birka, Sweden. Tortoise brooches (dress brooches) are worn in pairs on the front of a Viking woman's dress. It was customary to suspend a string of beads and charms between them. The brooches are sold in pairs. Size: 8,4 x 6 cm (3. 3" x 2. 3") Material: Bronze Norse women wore pairs of oval brooches to fasten the shoulder straps of a tunic worn over other garments. Beads of amber, wood or glass may