🐶 Pet Hat & Hood Size Grader

Crochet your dog or cat hat, ear-hole snood or hood once in one size, then let this tool write it out for any other size, from a kitten to a giant breed, in the same yarn and gauge. Also try the Pet Sweater Size Grader, the Hat & Hood Size Grader, the Sock & Bootie Size Grader and the Pattern Size Grader.

Step 1 · Add your pattern

📄 Drop a pattern PDF (or .txt) here, or click to choose

Text-based PDFs work best; for scanned PDFs paste the text instead. Everything runs in your browser.

Pattern text for the base size (edit freely)

Tips: start each part with a heading line (e.g. HAT, SNOOD, HOOD, EAR HOLES, BRIM, CHIN STRAP, NECK, DECORATIVE EARS). Tag a stitch multiple on its own line like [multiple of 6]; it applies until [multiple off] or the next tag. Increases grade best written as a target ("increase evenly to 36 sts") rather than a stitch-by-stitch repeat.

Step 2 · Choose the size you made and the sizes you want

Select your base size (the pet or size you crocheted for) and tick every size you want written out. Measurements are typical and fully editable, and ears and head shapes vary a lot, so measure the actual animal whenever you can. Head: around the head, over the top just in front of the ears and under the chin. Ear gap: across the top of the head between the inner edges of the ears. Ear base: around the base of one ear (for ear holes). Top: from the eyebrows over the top of the head to the base of the skull. Chin strap: from the base of one ear, under the chin, to the base of the other. Neck: around the neck, where a collar sits.

Show sizes for

Measurement unit

Gauge: stitches over 4 in

Gauge: rows over 4 in

Swatch size (in)

Head & neck ease (%)

The scaling comes from the size chart (same yarn, same gauge). Gauge and ease are only used for the cross-check in the results. Snoods and hoods usually have 0% to +5% ease so they slip over the head without slipping off; never make anything tight around a pet's neck or throat.

Step 3 · Options & section adjustments

Pattern type Leave counts smaller than alone Snap direction Snap every stitch count to the multiple (not just foundation chains and totals) Round stitch counts to even numbers (for symmetry)

Each section chooses which measurement drives its stitches and rows. For hats that cover the head, HAT, SNOOD, HOOD and BRIM follow head around and the top length. For mini hats that sit on top, the hat and brim follow the gap between the ears instead. In both, EAR HOLES follow the ear base; CHIN STRAP and TIES follow the chin strap and aren't widened; NECK follows the neck; DECORATIVE EARS, HORNS and ANTLERS follow the head; POMPOM isn't scaled. Change any of them below. Click a highlighted number in the results to lock or unlock it.

Results

View

12 original9 graded11 snapped to multiple3 locked/skipped

Stitch & row cross-check

Estimates from your gauge: head and neck stitches = measurement × (1 + ease) × stitches per unit; stitches between ears use the ear gap; an ear hole's chain is about half the ear base (it opens into a slot the ear passes through); a mini hat's base is about π × ear gap around; top rows = top length × rows per unit. Compare these with the graded counts, especially the ear holes and the space between them.