If your crochet is rippling at the edges, growing wider, or drifting crooked, the cause is usually one of three things: your stitch count drifting, your tension, or the turning chain. The good news is they are all easy to spot once you know what to look for, and the main fix is simply counting your stitches every row.

Why does crochet go wavy or crooked?

A flat piece should keep the same number of stitches on every row. When that number creeps up, the fabric has more stitches than it can lie flat with, so the edges ripple and wave. When it drops, the piece narrows and pulls crooked. So "wavy" almost always means your stitch count, your tension, or your edges are not staying consistent row to row.

One of the most common causes: stitch count drifting

Accidentally adding or missing stitches is one of the most common reasons for wavy edges. It is easy to do: an extra stitch in the first or last stitch of a row, or a missed one, and the count quietly changes. The fix is not to crochet more carefully through willpower, it is to count your stitches at the end of every row and compare to your pattern.

The other usual suspects: tension and the turning chain

Two more things to check before you blame the count:

  • Tension: if your stitches vary in tightness, the fabric distorts even with the right count. Aim for an even, relaxed tension.
  • Turning chain: working into the turning chain when you should not, or skipping it when you should not, changes the edge stitch count. Follow your pattern on whether the turning chain counts as a stitch, and be consistent every row.

How to keep your crochet edges straight

  1. Count your stitches at the end of every row, before you turn.
  2. Put a stitch marker in the first and last stitch of each row so the edges are easy to find.
  3. On a big project like a blanket, drop a marker every 50 stitches, so a miscount only costs you one section to recheck.
  4. Compare your count to the pattern, and fix a wrong row before you build on top of it.

See how to count rows in crochet and how to use stitch markers in crochet for the two habits behind straight edges.

Catch it early with Knittle

A wrong stitch count caught one row later is a thirty-second fix. Caught ten rows later, it is a frogging session. Use Knittle's stitch and row counter to track your count as you go, with custom counters for repeats, all kept and synced across your iPhone, iPad and Apple Watch, so wavy edges get caught while they are still easy to fix.