Plus-Size Pet One-Piece Pattern Generator

Add belly girth to control chest-to-belly proportion

The plus-size one-piece uses chest, neck, belly girth, back length and front-leg gap. Measure belly girth separately around the fullest abdomen so the draft can respond to chest-to-belly proportion rather than treating the torso as one circumference.

Record your pet's actual measurements first, then consider the stretch of your chosen fabric. Stretchier fabric may call for an adjustment to circumference inputs; do not scale back length or leg gaps along with them. See the measurement guide below for measuring methods and stretch-fabric guidance.

Compare chest, belly and front-leg openings

In the preview, review the transition from chest to belly, the back length and front-leg openings. When chest and belly differ substantially, check that abdominal coverage is neither tight nor sagging and confirm unusual proportions through remeasurement first.

Test while standing, sitting and lying down

Belly room needs checking in several positions. Test in material close to the final stretch and thickness and assess the neck, chest, abdomen and leg roots while the pet stands, sits, lies down and walks, ensuring closures do not press into the belly.

Each payment includes two PDF exports for the same pattern style. Make a test garment after the first export. If a measurement was wrong or the fabric stretch makes the fit too loose or tight, recheck and adjust the relevant measurements, then use the remaining export for the revised pattern.