Body measurements describe you. Garment measurements describe the clothes. Before choosing a jacket size, establish which type the product's chart uses, what each dimension means and how it was measured. Comparing a body circumference directly with a flat garment width can lead to a misleading result.
You do not need to guess a standard amount of extra room. A useful comparison begins with the exact product instructions and, where appropriate, a jacket you already find comfortable. This guide shows how to turn a size chart into a clear comparison and what to ask when the information is incomplete.
Read the chart heading and the measuring instructions
Look for wording such as body measurements, recommended body measurements, garment measurements or measured flat. Then check the units. A heading such as bust or chest is not enough by itself: it may refer to a measurement around the body, around the garment or across its front.
Check the instructions beside the chart, including any diagram. A length measured from the shoulder is a different reference from one measured from the collar seam. Sleeve measurements may also use different starting points. Write down the method before you take out a tape measure.
If the chart gives body measurements
Measure your body following that chart's instructions, using a flexible tape and the specified clothing or underlayers. Keep the tape positioned as directed rather than pulling it tighter to obtain a preferred number. If you cannot keep it level or read it comfortably, another person may help.
Compare those measurements with the corresponding body ranges. Do not add an arbitrary allowance for a jumper to a recommended body chart: the designer's fit allowance is not established by your calculation. Read the product's layering and fit guidance, then ask about your intended layer if that remains unclear.
If the chart gives garment measurements
Choose a similar garment that fits you in the way you want. Prepare it according to the measuring instructions: for example, fastening it and laying it flat if that is the stated method. Smooth it without stretching, and measure from the same points used in the product guide.
Compare like with like. Flat width should be compared with flat width, and circumference with circumference. Do not double a figure unless the guide clearly defines it as a half-width that should be converted. A label such as bust can be ambiguous, so confirm the method when necessary.
Your reference jacket is useful only in context. A close-fitting jacket worn over a thin top may not represent the fit you want over knitwear. Different constructions can also move differently even when some dimensions match. Measurements narrow the choice; they do not reproduce a try-on.
Make a comparison sheet
Create a note with these fields for each candidate. Leave missing values blank so they remain questions, rather than filling them from a photograph or another product.
- Exact product and size: include the current product link.
- Chart type: body range, garment dimensions or not stated.
- Units and method: centimetres or inches; flat or around; measurement starting points.
- Relevant dimensions: only those provided, such as chest, shoulder, sleeve or length.
- Your matching reference: the same measurement taken by the same method.
- Outstanding question: the detail you need before deciding.
When measurements point to different sizes
If your dimensions fall across more than one size, do not simply average them or choose by the size letter you usually wear. Identify the area that limits movement or closure for your intended outfit. Ask how the cut accommodates that area and whether the alternative size changes the shoulders, sleeves or length in a way you would dislike.
A useful question is specific: “Does this chart show garment circumference or flat width, and where is the sleeve measured from?” It gives the retailer something answerable. “Will this fit me?” is much harder to resolve without the measurements and your intended fit.
Use the guide for the exact piece
Open the size guide on Sabine or Élodie and complete a separate comparison sheet for each. Do not transfer dimensions between products. If you are still choosing the kind of layer, start with our cardigan-or-jacket guide, then return to the exact chart before selecting a size.