When a 1-millimeter guard trims facial hair to 1/25th of an inch, does it still result in designer stubble?

Yes, trimming facial hair with a 1-millimeter guard would result in designer stubble, as 1/25th of an inch is approximately equal to 1 millimeter. Designer stubble typically refers to short facial hair that is around 1-2 millimeters in length, so using a 1-millimeter guard would achieve this desired look.

No, designer stubble is typically longer than 1/25th of an inch. A 1-millimeter guard will typically trim facial hair to about 1/16th of an inch, which is shorter than the typical range for designer stubble.