Our high-carbon steel router plane blades fit our Veritas large and medium router planes and our Veritas hinge mortise plane, as well as Stanley #71 router planes (with the height-adjustment nut inverted).
These narrow single-piece blades are available in five Imperial sizes (1/16", 3/32", 1/8", 3/16" and 1/4") and also as a set of all five blades. Sizes stated are nominal. Metric sizes are available separately.
Note: 1/8" blade is the same size as the 3mm narrow blade.