New Sewing Machine Thread - Small Spools Dia Feather #50 Price is for 1 bobbin x 7 pieces. - Color: White - Material: 100% Polyester Approximately 45m per spool. ◎ We consider 90% of the bobbin to be the winding amount, but please allow for variations of more than 90%. Bobbin Size: Diameter - Approximately 20mm Height - Approximately 11.5mm Hole - Approximately 6.2mm Material - Transparent plastic Please be aware that these bobbins are for small spools. Only those who understand the above and the nature of the small spools, please purchase.