Guide
Crochet stitch height, turning chains, and terminology
Compare common post heights, understand turning-chain choices, and avoid US–UK naming traps.
Height comes from the loop sequence
In standard US terminology, single crochet starts without a yarn over before insertion. Half double and double crochet start with one; treble starts with two. The number of times loops are worked off then creates progressively taller posts. Taller stitches usually make a more open, flexible row, but yarn, hook size, and tension can change the fabric substantially.
A turning chain is an instruction, not a universal constant
At the end of a flat row, chains raise the hook toward the next row's working height. The pattern must say how many to make and whether they count as the first stitch. If they count, skipping their base or working into the wrong top chain changes stitch count; if they do not, treating them as a stitch creates a gap. Mark the first and last true stitch while learning.
Translate names before you translate movements
US and UK terms assign different names to several identical movements. For example, US single crochet corresponds to UK double crochet. Never infer the movement from an isolated name: identify the terminology used, read the abbreviation key, and follow the pattern's special definitions. The interactive figure deliberately labels the US set.
Interactive figure
Build crochet stitches one level at a time
Compare relative height and the yarn overs made before inserting the hook.