Vinyl on stairs
A vinyl floor that continues onto a staircase needs a nosing at the front of every tread, in the same print as the floor, and usually a riser to go with it.
It is a different job from a transition on the level, and the vinyl trim range separates the two for that reason. The LVT transitions collection covers everything on the flat.
LVT stair nose on a floating floor
Vinyl plank that clicks together floats, so the edge at the front of a step has a gap to protect. That points at the overlap profile.
Glue down vinyl is the other case: held at its edges, so a flush profile suits it. The stair nose page sets out the difference, and the flush and overlap pages cover each.
Why the print matters more on stairs
A staircase repeats the same detail more than anywhere else in a house: one nosing per step, all of them visible at once when you stand at the bottom.
An approximate color match that passes at a single doorway becomes obvious when it is repeated a dozen times up a wall. It is the strongest argument for buying nosing from the same range as the floor.
Counting stair nose pieces
Rooms get measured in square feet. A staircase gets counted in steps, and that change of habit is where flooring orders come up short.
The list is short: a nosing for every tread, a riser for every step on a closed staircase, and a finished end at any tread left open at the side. The third item is the one that gets missed, because it depends on the shape of the staircase and not on the number of steps, and the stair nose page covers what that finished end is.
Risers and the rest of the stair
A riser for the vertical face of each step, and a finished end on the nosing wherever a tread is open at the side.
Those two are the items most often missing from a first order, because they are counted per step instead of per room.