Boat Neck Jumper to fit chest 22" [24": 26": 28": 30"] use King Cole Beaches DK 100g - Beaches and Cream (4275) 2 [3: 3: 3: 4] balls. Round Neck Jumper to fit chest 22" [24": 26": 28": 30"] use King Cole Beaches DK 100g - Waikiki Beach (4276) 2 [2: 3: 3: 4] balls.