Blade length is measured from the screw to the tip of the blade.
Blade length: Up to 4" (£3.80 inc VAT) 4 - 4 1/2" (£4.30 inc VAT) 4 1/2 - 5" (£4.80 inc VAT) 5 - 6" (£5.80 inc VAT) 6 - 7" (£6.80 inc VAT) 7 - 8" (£7.80 inc VAT) 8 - 9" (£8.80 inc VAT)