Bobbin size: about 21 x10 mm (W x H)You will get 25pcs empty bobbins which in a storage boxThey will fit most models, Singer models and some late Brother modelsBox Size : 12 x 10 x 2.5cm (L x W x H)Material: Plastic100% brand new and high qualityColor : As the pictures showQuantity: 50 pcsNote: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes:50 x Plastic Empty Bobbins Case For Brother Singer Sewing MachineOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.