An invisible decrease turns two single crochets into one while leaving less bulk on the visible side than some ordinary decreases. It is widely used for amigurumi worked in continuous rounds. The stitch is small, but its effect on the count is straightforward: every completed decrease removes one stitch.
Stitch terminology: This guide uses US names. US single crochet is UK double crochet; US half double is UK half treble; US double is UK treble. See the full US/UK reference.
Use it in the right setting
The common invisible-decrease method picks up the front loops of two neighbouring stitches. The unused back loops stay on the reverse. That makes it particularly useful when the surrounding fabric is ordinary single crochet and the same side remains outward.
It is not a universal replacement for every decrease. Back-loop-only fabric, turned rows and patterns intended to display the reverse may need a different method. Follow the designer’s special-stitch instructions when they are provided.
Work through the two front loops
- Insert the hook under the front loop of the first stitch.
- Without yarning over, insert under the front loop of the next stitch.
- Yarn over and draw through those two front loops.
- Yarn over and draw through the two remaining loops on the hook.
One new top V replaces the two old stitches. Do not work into either of those old stitches again. The next ordinary stitch goes into the next untouched position around the piece.
Check the arithmetic before checking the appearance
Suppose a round begins with twenty-four stitches and the instruction is “single crochet in the next two stitches, decrease,” repeated six times. Each group uses four old stitches and produces three new ones. Six groups therefore use all twenty-four and leave eighteen.
| Part of one group | Old stitches used | New stitches made |
|---|---|---|
| Two single crochets | 2 | 2 |
| One invisible decrease | 2 | 1 |
| Total | 4 | 3 |
Count at the end of the round. A neat-looking decrease in the wrong place still changes the shape, so use markers at the round start and at any important shaping points.
Watch the loops beside the decrease
If the decrease leaves a hole, inspect the working loop before and after the movement. Swinging the hook through two front loops can lengthen it. Moving on to the next stitch can introduce slack too. Keep those movements controlled without squeezing the whole fabric tighter.
Compare the neighbouring top Vs. If they are much longer than the others, correct that local slack on the next sample. Simply changing to a smaller hook can make the entire piece rigid while leaving the underlying habit unchanged.
Practise before the narrowest opening
Try the movement on a small open tube while you can still see inside. Later, near a tightly shaped top, the insertion points are harder to inspect. Marking the first completed decrease gives you a reference for what its top looks like.
Use light, smooth yarn for the practice piece. Plush yarn can hide both mistakes and good technique, which makes it less useful for learning the exact path.
Keep the technique separate from toy suitability
A tidy decrease improves the fabric’s appearance; it does not establish that a finished toy is suitable for a particular recipient. Materials, construction and intended use remain separate decisions. For learning, an unstuffed practice tube is enough to check the stitch and the count.
Continue learning
Understand shaping counts · Identify the loops · Diagnose unwanted gaps
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