Sizing complaints account for roughly 18% of the returns we see on first-batch custom logo gloves. The size chart in your tech-pack is doing more work than most buyers realise. Here is how to measure glove size correctly for an OEM order, the size systems that actually matter for B2B buyers, and the four sizing mistakes I have watched first-time importers make.
Why Sizing Is the Quiet Killer of First Orders
Of the post-shipment complaints we get in the first 60 days of a buyer relationship, sizing issues are the single most common - more than colour, more than decoration durability, more than QC defects. Almost all of them are preventable on the tech-pack. The trouble is that 'medium' means six different things across the US work-glove, EU cycling, Asian sport and global nitrile-exam markets - and a buyer who copies a competitor's size chart without measuring their own end users gets shipped a perfectly-made batch that nobody wants.
The Two Measurements That Actually Decide Size
Two numbers, taken with a soft tailor tape on the dominant hand (the one you write with - it is typically 3-5% larger): (1) palm circumference, measured around the knuckles excluding the thumb, fist loosely clenched. (2) hand length, measured from the wrist crease to the tip of the middle finger. Almost every glove sizing standard in the world is built on these two numbers; everything else (finger length, thumb crotch, cuff width) is derived. If your tech-pack only specifies one of these, you have not given the factory enough information.
The Three Sizing Standards That Matter for B2B Buyers
EN 420 (European) is the most common reference for industrial and work gloves. Sizes are labelled 6, 7, 8, 9, 10, 11 corresponding to palm circumference in inches (size 8 = 8" = ~20cm). ISO 21420:2020 superseded it in 2020 but most factories still print EN 420. ANSI/ISEA 105 in the US uses XS-S-M-L-XL-XXL and roughly maps to EN 6-11. Asian sizing (used on most fast-fashion and sports gloves shipped from China) runs about half a size smaller than EU equivalents - an 'EU large' is often labelled 'XL' on the Asian chart. Get this wrong and your 'medium' batch will be marketed-medium on Amazon but actual-small in EU hands.
Category-Specific Size Charts We Use
Work / safety gloves (cowhide, HPPE): 6 (~17cm palm), 7 (~19cm), 8 (~21cm), 9 (~23cm), 10 (~25cm), 11 (~27cm). Cycling gloves: tighter fit, sub-half sizes common (XS = 17cm, S = 18.5cm, M = 20cm, L = 21.5cm, XL = 23cm). Ski / winter gloves: looser fit + insulation room, add 1-1.5cm to work-glove circumference. Garden gloves for women: separate cut, narrower across the palm at the same circumference, shorter middle finger. Nitrile / disposable: stretchy nitrile is more forgiving so XS-XL covers most users, but choose the right wall thickness - 5mil bags differently from 3mil at the same labelled size.
How to Build a Size Chart for a Custom Logo Gloves Order
Three options, ranked by accuracy. Option A: send us a working sample (a glove your end user already wears comfortably) and we reverse-engineer the size grade across 5-6 sizes. Slowest (2-3 days extra) but lowest risk. Option B: send your spec in palm-circumference + hand-length per size, with a 5% tolerance. We grade the pattern from there. Option C: tell us your customer profile (region, gender split, sport / industry) and we propose a chart from our 240-mould library. Option C is fastest but you accept that the chart fits an average customer of that profile, not your specific channel.
Sample Pairs - Why You Should Pay for One Per Size
It costs $50-120 per size to get a logo-decorated sample, but $0 for an unbranded sizing sample. We give B2B buyers one free reference set of stock sizes if they request it up front. Always physically try them on with your target end user - not your hand. The single most common avoidable mistake is a male buyer signing off on women's gardening gloves based on his own fit, then receiving 1,500 pairs that fit nobody in the actual market.
Custom Size Ranges - When the Standard Chart Does Not Fit
We routinely run custom sizing for: oversized industrial (12-13, palm 28-30cm - common for US Midwest construction); women's specialty (narrower across the palm at the same circumference - garden, cycling, lifestyle); ambidextrous left-hand stock for left-handed gloves brands; and kids' sub-XS (palm under 16cm) for school-uniform and youth-sport accounts. Custom sizing adds 1-2 weeks to pattern development and a one-time $80-150 grading fee, but you only pay it once per chart.
Labelling Your Size Chart on Packaging
Three label conventions that B2B retailers accept: dual-label (e.g., 'M / 8' or 'L / 9') is the EU/US-friendly default. Numeric only (just '8') is industrial PPE convention. Letter only ('M') is consumer / sports / fashion convention. Amazon FBA requires a parent-listing with size variants tied to a clean S/M/L scheme - if your chart deviates, you will lose 10-15% conversion from confused shoppers. Print the size on the inside cuff label AND the polybag for FBA prep efficiency.
Tolerances - What Counts as 'Made to Size'
Industry-standard tolerance on finished gloves is +/- 5% on palm circumference and +/- 8mm on hand length. Tighter tolerances (3% / 5mm) cost about 6-9% more because they force scrap-rate increases at the cutting stage. Cycling and fitness brands often pay for the tighter spec; bulk work-glove buyers almost never do. Spell the tolerance out on your PI - 'fit to chart' without a number means whatever the factory feels like, which can include the supplier we replaced last year shipping a batch where the 'L' was 1.5cm under spec.
Five Sizing Mistakes I See on First Orders
(1) Copying a competitor's chart without verifying their measurement method. (2) Specifying only one of palm-circumference or hand-length. (3) Running a 6-size grade on an MOQ of 300 pairs (one size per 50 pieces is statistically pointless - cut to 3 sizes minimum). (4) Skipping the female-fit pattern on a unisex product (women buy ~40% of garden gloves, 25% of work gloves, 22% of cycling gloves - the unisex pattern is actually a male pattern). (5) Not labelling left / right on hand-asymmetric gloves (most cycling, lifting and ski styles have hand-specific cut), causing confused returns even when the size is perfect.
Lead-Time Reality on Size-Heavy Orders
Adding a size to an existing chart adds about 4 days for pattern grading and 2 days for sample approval. Adding a whole new size grade (e.g., kids' sub-XS for an adult-only product) adds 10-14 days. On a fresh OEM brief with 6 sizes, expect sample sign-off in 18-25 days end-to-end versus 10-14 days on a 3-size brief. If your launch is tight, ship the 3-size SKU first and add 4-5-6 in your reorder.
Talk to Someone Who Actually Makes Gloves
If you have a project you are scoping, send us the rough brief - target market, decoration method, an idea of quantities. We will reply with a realistic price band and an honest read on lead time. No deck, no high-pressure pitch.
If anything in this piece was unclear or contradicts what another supplier told you, email and ask. We answer most messages within one working day (CST 08:30-18:00).