Good fit starts
with good information.

By Resevaria Editorial · Updated 18 October 2026

A size label is a starting point. Compare the exact retailer's chart, your measurements and a garment you already enjoy wearing.

Body measurements and garment measurements differ

Check which kind a chart provides. A garment includes ease for movement and layering; do not expect its circumference to equal your body measurement. Use the retailer's measurement instructions and the same units throughout. Do not assume US, UK, Italian or French sizes convert consistently across designers.

Jackets and shirts

Try the intended underlayer. Check that the shoulder sits as designed, the collar lies comfortably and the front closes without pulling. Move your arms and sit down. Oversized and dropped shoulders are intentional cuts, not automatically fit faults. Ask a tailor about feasibility before buying a jacket that needs shoulder alterations.

Trousers and skirts

Check the waist at the intended rise, then the hip and thigh while sitting. Pin the hem wearing the actual shoes. A fuller trouser may need a different length from a narrow ankle cut; leave clearance so fabric does not catch under the heel. Confirm seam allowance before relying on extra length.

Dresses and evening pieces

Test sitting, walking and raising your arms. Check necklines, fastening access and opacity in realistic lighting with your intended underlayers. A bias-cut fabric may settle differently after hanging; ask the maker or tailor before adjusting the hem.

Footwear

Measure both feet using the retailer's method. Check width, toe space, heel hold and comfort with the intended socks or hosiery. Walk indoors on a clean surface while preserving return eligibility. Do not rely on painful shoes stretching to fit.

Before an alteration

Confirm the return decision first: altered merchandise may no longer be returnable. Get a quote and explain the intended silhouette. Small hem or sleeve changes can help, but construction, pocket placement and seam allowance limit what is possible.

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What should you take to a fitting?

Bring the intended underlayers, shoes and any belt that affects the garment’s position. Explain how you want the piece to look and where you need room to move. Ask the tailor to pin the proposed change before cutting, and confirm cost and timing. Do not ask a hem to compensate for a rise or waist position that feels wrong.

What can an online size guide tell you?

A guide can help compare measurements, but it cannot establish comfort, fabric stretch or the intended ease of every cut. Use the exact item’s chart where available and ask the retailer when body and garment measurements are unclear. Record your reference garment’s dimensions using the same method. No universal designer-size conversion is offered here.

Pair shoes with the final hem · Rehearse an occasion outfit

THE RESEVARIA NOTEBOOK

Use a garment you know as a reference

Measure a well-fitting garment flat according to the retailer’s measurement method, and record whether the figure is a garment measurement or a body measurement. Compare like with like. A size label does not reveal the amount of ease, stretch or intended silhouette. For a fitting, wear the underlayers and shoes that belong with the outfit. Tell the tailor how you expect to sit, walk and reach. Settle the keep-or-return decision before alterations, and obtain an assessment before assuming a major construction change is economical.

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