FRX22' to FRX 26.5' or diameter 185mmTurntable Belt (185-188mm)
To work out what size you require you will need to measure the diameter of the subplatter. The subplatter is the cylindrical section on the underside of the platter that the belt goes around. On some turntables it is a separate item and the platter lifts off it. With many turntables it is like this photo where there is a raised cylinder on the underside of the platter. You'll need to lift the platter off and turn it over. To select the correct size belt measure the diameter (the distance across not around) the subplatter. This will usually be in the range 140mm to 210mm. Then choose the belt size just below the measurement. eg if the diameter is 198mm, choose a 185-188mm belt.
Remeber the belts are rubber and there is sufficient stretch for the belt to reach the motor spindle.