Is a size chart the same as a size guide?

No. A size chart is usually the table of measurements for a product. A size guide often includes how to measure, fit notes, conversions, and the chart itself.

Where should the size guide link go on a product page?

Near the size selector or add-to-cart area so shoppers see it before they choose a size.

Should size guides include how-to-measure images?

Yes, when fit is tight or returns are costly. Baymard and Shopify both recommend clear measuring instructions for apparel.

30 September 2026

Size Chart vs Size Guide: What’s the Difference (and Do You Need Both)?

Short answer: A size chart is the table of measurements for a product (chest, waist, length, etc.). A size guide is the wider help around sizing: how to measure, fit notes, unit conversions, and often the chart itself. Many stores use one popup that contains both.

What goes in a size chart

Size labels (S, M, L or 32, 34, …)
Body or garment measurements per size
Units (inches, cm) — offer both when you sell internationally

What goes in a size guide

How to measure (with simple diagrams)
Fit notes (“runs small”, “relaxed fit”)
Conversion between US / UK / EU where relevant
The size chart table itself

Do you need both?

For most apparel stores, one well-designed popup that includes measuring instructions and the table is enough. Honest Size Charts focuses on showing the chart in a theme app block popup; add fit notes in your product description or chart title when shoppers need extra context.

Examples and research

Baymard — size guide examples (UX research)
Shopify — why your store needs a sizing guide (merchant education)

Install on Shopify

Next: Do size charts reduce returns? · Templates hub · How to add a chart in Shopify

FAQ

Is a size chart the same as a size guide?: No. A size chart is usually the table of measurements for a product. A size guide often includes how to measure, fit notes, conversions, and the chart itself.
Where should the size guide link go on a product page?: Near the size selector or add-to-cart area so shoppers see it before they choose a size.
Should size guides include how-to-measure images?: Yes, when fit is tight or returns are costly. Baymard and Shopify both recommend clear measuring instructions for apparel.