What to record before cutting your fabric

A cutting plan is easier to revisit when its decisions have names, dates and units. A note such as “washed, looks fine” leaves several questions open: which fabric, which wash, and what changed? Before cutting, make a small record that another sewing session can understand. The aim is useful context, not an impressive collection of numbers.

Start with a blank sheet. The Sewlore Sewing Preparation Library includes blank measurement records and project-planning templates in printable and editable formats. Its browser worksheet has 35 labelled fields; you need only the fields relevant to your project. Empty spaces are intentional. They are not missing results or evidence that a test has already happened. The sheets are recording aids, not calibrated rulers; physical printer testing of the preparation pack is still pending.

Give the project and the fabric separate identities

Choose a project ID that will still make sense next month, such as “shirt-A”. Record the pattern name, designer, file version or revision date, chosen size or size combination, and the instructions you are using. Keep the actual file reference beside the notes. A change to the pattern should create a new dated entry rather than silently overwrite the earlier plan.

Give the fabric its own sample ID. Record a useful description, where the sample came from and its condition: unwashed, previously washed, pressed, or another state you can explain. Keep a small labelled reference swatch if practical. The label connects later observations to this material; a colour name alone may not distinguish two similar fabrics.

Write the unit before writing the number

Put the unit in the column heading or beside every length. Decide whether a pair of readings will use millimetres, centimetres or inches, then stay with that unit for the calculation. Keep the source instruction as written. A conversion changes how a length is expressed; it does not change the physical length or choose a seam allowance.

For example, the Seam Allowance Converter can express an instruction in another unit. An illustrative 0.625 inch converts to 15.875 mm, or 1.5875 cm. That is arithmetic, not an allowance recommendation. Retain the pattern's instruction and avoid rounding more than your measuring tool can usefully support.

Keep the before and after readings together

If a care sample is relevant, mark a span in each direction on one swatch and identify those directions. Record the distances between the marks before treatment. Measure the same marked spans afterward; comparing different swatches or an unmarked cut edge can introduce another difference. Do not pull the fabric to make a reading match an expected result.

Follow the fabric manufacturer's appropriate care guidance rather than choosing a treatment from this worksheet. Note the actual washing and drying method, relevant settings, any pressing, and when the sample was measured. Let its condition be comparable before and after measuring. Do not assume that one recorded cycle predicts every later wash.

Use separate before-and-after entries for length and width. A useful record includes:

• Sample ID, direction and unit.
• Before length and the sample's starting condition.
• Care method actually used, with date and drying notes.
• After length, measurement date and any handling differences.
• Calculation and an observation that the numbers cannot describe.

Shrinkage percentage = (before − after) ÷ before × 100. The before value must be greater than zero, and both readings must use the same unit. In a purely illustrative example, a marked 20 cm span becomes 19 cm: (20 − 19) ÷ 20 × 100 = 5%. Enter your own readings in the blank fields; these example numbers are not measured fabric data.

If the after reading is larger, the formula produces a negative value. Keep that sign and describe what happened instead of changing it to zero. Check your marks, direction, unit and method when a reading seems unusual. A worksheet calculation is not a laboratory certification or a promise about the finished garment.

Record observations before deciding what they mean

Useful notes might describe curling edges, surface changes, a skewed marked span or different behaviour across the width. Distinguish an observation from a decision: “edges curl after drying” and “investigate handling before cutting” serve different purposes. Sewlore's fabric and elastic preparation guide provides context for reviewing material requirements.

Keep care measurements separate from stretch measurements. Pulling a span and measuring it after release answers a different question from measuring before and after washing. If stretch is relevant, add direction, method and rest time using the stretch and recovery recording method. Neither record establishes body-measurement accuracy or garment fit.

Leave a clear next action

Before cutting, confirm that the pattern revision, material notes and printed file belong to the same project. For a PDF pattern, follow its stated print settings, often Actual Size or 100%, and physically measure its supplied test reference in both directions. The printing and assembly guide covers file and page preparation. Writing “100%” in a plan does not mean that the print has been checked. Keep that task unchecked until you do it.

Finish with a short next action and a date: confirm the care instruction, repeat an unclear reading, review the cutting quantities, or plan a fitting sample. Store personal measurements privately. The record is useful because it preserves what you did and what remains open, so your next session can start with a decision rather than a guess.