FAQ · UK sizing
UK merch sizing and fit FAQ
Answers to common UK sizing questions: men's, women's, unisex, high-visibility workwear, BS EN ISO standards, brand-by-brand fit variation, size-swap buffers, gender splits, and on-site surveys.
UK and EU framework
UK corporate merch for staff is typically sized to UK and European standards. The British Standards Institute maintains BS EN ISO 13688 (protective clothing — general requirements) and BS EN ISO 14602 for non-protective apparel. Most branded merch apparel is sized to the brand's own label rather than a national standard.
Major brands serving the UK B2B merch market include Russell, Fruit of the Loom, Gildan, Regatta, Craghoppers, Portwest, Helly Hansen Workwear, Snickers Workwear, Scruffs and Brook Taverner. UK workwear brands tend to run slightly larger than equivalent US garments on the same labelled size.
Pricing and framework
Size splits typically require larger MOQ and increase the unit cost compared to a single-size order. A single-size order of 1,000 hoodies might be priced £18–£24 per piece; a 6-size split of 167 each carries a 4–7% higher unit price. A 4-size split runs at near-parity with single-size; an 8-size split typically adds 6–12%.
Lead time
Standard UK B2B merch lead time is 4–6 weeks from approved artwork for stocked products. Off-colour garments (less-common colourways, fabric compositions) may have only a partial size range available; this extends lead time by 1–2 weeks.
Seasonal planning
UK Q4 (October–December) is the largest single peak, with the heaviest weeks in mid-November and the final week of November for December distribution. Q4 programmes benefit from sizing finalisation by mid-September. Autumn-winter (October–March) is dominated by outerwear and heavier apparel; spring-summer (April–September) leans lighter.
Delivery and hand-over
Delivery and hand-over follow the standard UK courier network. When each size has a different delivery destination (e.g. 50 XL hoodies to one office, 30 S hoodies to another), the dispatch run is more complex. Suppliers typically pack each size as a separate inner carton labelled with the size, total quantity and destination.
What this is and what it includes
This FAQ answers the most common UK sizing questions on corporate merchandise. It is written for HR people managers, procurement leads running branded-apparel programmes, in-house marketing teams and event organisers.
Coverage includes: UK and EU sizing conventions, the BS EN ISO 13688 standard for protective workwear, the typical men's, women's and unisex size distributions for UK workplaces, worked examples for 200-person and 1,000-person programmes, high-visibility workwear sizing, the brand-by-brand fit variation, and the surcharge for additional size points.
When and for whom
This FAQ applies to all UK B2B apparel programmes. It applies to staff merch, customer merch and event merch. It applies to casualwear, workwear, outerwear and sportswear.
It is written for HR people managers onboarding new staff, procurement leads running branded-apparel programmes, in-house marketing teams running corporate-gifting campaigns, agencies distributing merch on behalf of clients, and event organisers managing conference-apparel.
It does not apply to personalised apparel (made-to-measure, bespoke tailoring) or to protective equipment beyond standard apparel.
Specifications and materials
Garments in 100% cotton fit closer to the body than equivalent garments in polycotton blends; merino wool garments fit closer than equivalent acrylic garments. For a UK 200-person programme, a workable men's t-shirt distribution is 5% XS, 15% S, 30% M, 30% L, 15% XL, 5% XXL. The corresponding women's distribution is 10% XS, 25% S, 30% M, 20% L, 10% XL, 5% XXL.
Common mistakes
The most common mistake is assuming UK and US garments fit the same on the same labelled size. UK garments run roughly one size larger than US garments on the same label.
The second is not including a 5% size-swap buffer. Without a buffer, the supplier has to manufacture additional units at additional cost, or the buyer accepts that some recipients will not receive the right size.
The third is failing to account for women's sizes in a unisex-buying programme. Unisex garments are typically cut for men's bodies; the fit for women is loose across the chest and shoulders. Offer women's-fit alongside unisex.
The fourth is over-ordering the outer extremes (XXXL, XXXXL, XS, XXS). The 200-person model suggests 5% want XXL; 0.5% want XXXL.
The fifth is failing to consider high-visibility workwear sizing separately. BS EN ISO 13688 includes specific size tolerances for garments carrying EN ISO 20471.
Process and steps
The standard process for sizing a UK B2B apparel programme runs as follows. Identify the population. Identify the gender distribution. Decide on the garment type. Apply the working distribution or run an in-house survey. Finalise the splits with the supplier. Confirm pricing and lead times. Order to the agreed split. Include a 5% swap buffer in S and M. Receive goods, do a fit-sample check, distribute.
Case study
A UK financial-services firm ran a 1,200-person staff-apparel programme. The workforce was 55% male and 45% female. The programme offered two garment styles: unisex hoodie for male-skew and women's-fit hoodie for female-skew. The procurement team applied the standard working distribution. A 5% buffer in S and M was added. Total order was 1,260 hoodies. The programme was delivered on time and the size-swap buffer covered 4% of subsequent requests.
Compliance and certifications
UK apparel sizing standards include BS EN ISO 13688 (protective clothing — general requirements) and BS EN ISO 14602 for non-protective apparel. BS EN ISO 20471 specifies the photometric and chroma-tolerance requirements for high-visibility materials. UKCA marking replaces CE marking for products placed on the UK market (Great Britain).
Comparison with other solutions
Compared with catalogue-based promotional product distributors, a UK B2B merch supplier offers a wider size range from the brand's standard stock. Compared with print-on-demand merch, the dedicated supplier offers a complete size run from stock. Compared with overseas-sourced apparel, UK-domestic apparel follows the same sizing conventions.
Program lifecycle
A typical UK B2B apparel programme runs from brief to closure in 4–8 weeks. The size-swap buffer covers post-delivery requests. Repeat apparel programmes use the same size distribution with a delta review. Annual reviews are typical for staff-apparel programmes.
Closing note
UK corporate apparel sizing follows UK and EU conventions; the working 5–6 size split (S/M/L/XL/XXL) works for most workplaces. UK fits slightly larger than US fits on the same labelled size. Plan a 5% size-swap buffer; offer women's-fit alongside unisex where the workforce includes a significant female population.
Get a sizing review
For a sizing review and a quotation that reflects your size split and fit preference, send the population size and the garment style through the form below.