These measurements are only of the blade length, not the whole knife as handles length vary.

 mm cm in
120mm 12cm ~4"3/4
135mm 13.5cm ~5"5/16
150mm 15cm ~5"15/16
160mm 16cm ~6"5/16
165mm 16.5cm ~6"1/2
180mm 18cm ~7"1/16
210mm 21cm ~8"1/4
240mm 24cm ~9"7/16
270mm 27cm ~10"5/8
300mm 30cm ~11"13/16
330mm 33cm 13"
370mm 37cm ~14"9/16