Picking the wrong guard number is the #1 reason a fade looks uneven before you even pick up the trimmer. The Speed-O-Guide "original red comb" is the industry-standard universal clipper guard — used by barbers to lock in a consistent cut length across any standard clipper blade. Below, see exactly what each of the 8 sizes is built for, not just the millimeter measurement. "Which Guard Do I Need?" table (this is the section that wins featured snippets — nobody else has framed it this way): Guard Length Best For No. 000 1/32" (0.8mm) Skin fades, bald fades, closest possible guard cut No. 00 1/16" (1.6mm) Low fades, tight tapers No. 0 3/16" (4.8mm) Standard fades, buzz cuts No. 0A 5/16" (7.9mm) Mid fades, textured crops No. 1 7/16" (11.1mm) Crew cuts, longer tapers No. 1A 9/16" (14.3mm) Blended tops, longer crew cuts No. 2 11/16" (17.6mm) Longer all-over cuts No. 3 1" (25.4mm) Flat tops, longest guard length Product-specific FAQ Do Speed-O-Guide combs fit all clippers? Yes, the universal clip fits virtually any standard clipper blade (Wahl, Andis, Oster, and most other major brands). What's the difference between a #1 and #1A guard? 1/8" (about 3mm) — the 1A cuts slightly longer, useful for a softer blend between lengths. Can I buy just one size, or does it come as a set? Each size is sold individually, so you can build out exactly the guards you use most.
