To determine what size reel knob you need or weather this knob will fit on your Reel (Shimano, Daiwa, Avet or Accurate); please kindly disassemble your handle knob and following the steps: 

• Measure your reels handle knob Shaft length. 
• Measure two bearings' (or plastic busings/ sleeves) O.D. from inside of your original knob (one bearing near handle arm and the other outer bearing located near handle knob end cap) and I.D. 

Please see below photos (click to enlarge) as your reference. 

We need to know the bearings' width of O.D. & I.D. and the Shaft Length; then, we can help you to get the suitable Custom Reel Knob. 

Please kindly email us your measurements at info@pbmfishing.com, we will get back to you ASAP.