ladder stitch

noun

an embroidery stitch in which crossbars at equal distances are produced between two solid ridges of raised work.

Origin of ladder stitch

First recorded in 1880–85

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Any design that is uniformly narrow can be carried out in ladder-stitch.
The Library of Work and Play: Needlecraft
Effie Archer Archer
Ladder-stitch occurs in the cusped shapes framing certain flowers in Illustration 72, embroidered all in blue silk on linen.
Art in Needlework
Lewis F. Day
In order to make your ladder-stitch (G) square at the end, you begin by making a bar of the width the stitch is to be.
Art in Needlework
Lewis F. Day