Why Your Christmas Jumper Arrived Two Sizes Too Small

You ordered a large. A large arrived. It fits like a medium, possibly a small, and you now have four days to sort it out. This is the single most common thing that goes wrong when buying a Christmas jumper online, and it is entirely predictable once you know why it happens.

The letter on the label is not a measurement

There is no international standard for what “L” means. It is a manufacturer’s shorthand, and it refers to the body shape that manufacturer designs for.

A great many novelty Christmas jumpers are made to Asian sizing, which is drafted for a slimmer build, narrower shoulders and a shorter torso than UK sizing assumes. The practical effect is that a garment labelled Large can fit closer to a UK Medium, and sometimes smaller — a difference of one to two sizes, occasionally three.

None of this is deception. It is a manufacturer sizing for its own domestic market and then selling internationally without re-labelling. But it does mean the letter tells you almost nothing useful, and sizing mismatch is consistently cited as the leading cause of clothing returns and poor reviews on the big marketplaces.

Background: Asian to Western size conversion guide

Which brands this affects

As a rough rule, the more the brand name looks like a randomly generated string, the more likely it is sized to an Asian fit. Names like Arvilhill, uideazone, Lovekider, Mainfini and GTETKDE are marketplace brands manufacturing to their domestic pattern.

Established Western labels — Hanes, Tipsy Elves, Blizzard Bay, Fifth Sun, and the officially licensed ranges — generally size true to UK and US expectations, because that is who they were built for. If you want to order a letter and trust it, buy one of those.

The one thing that actually works

Measure a jumper you already own and like, and compare it to the listing’s measurements. Not your chest — a jumper that already fits you. It takes two minutes and it is the only method that survives contact with inconsistent labelling.

• Chest. Lay the jumper flat, measure armpit to armpit, and double it. That is the number to compare.
• Length. Centre of the collar straight down to the hem. This is the measurement people forget, and it is why some jumpers ride up when you raise a glass.
• Sleeve. Shoulder seam to cuff. Matters most on knitwear, which has less give than fleece.

If the listing gives no measurements at all, treat that as information in itself.

Sizing is one part of a bigger decision — how to choose an ugly Christmas jumper covers the rest.

When to size up, and when not to

“Just size up” is the standard advice and it is too blunt. It depends on what the jumper is made of and what you are doing in it.

Size up when

• It is knitted. Knit has structure and does not drape over a shirt the way fleece does.
• You will wear something underneath — which, with acrylic, you will.
• You are between sizes. Always round up on novelty knitwear.
• It is described as slim fit, snug fit or fitted. Those words are doing real work.
• You are buying for a child. A slightly big jumper gets worn; a slightly small one gets refused.

Do not size up when

• It is already described as oversized, loose or relaxed. That is on top of the size, not instead of it.
• It is a hoodie with a front pocket — an oversized one puts the pocket somewhere unhelpful.
• It has lights. A loose light-up jumper lets the battery pack swing about, which is as irritating as it sounds.
• It is a two-person jumper. Those are cut to a specific geometry and guessing does not help.

Buying for a group

If you are ordering for a team, order one first and try it before committing to a dozen. Sizing on budget unisex ranges varies not only between brands but sometimes between colourways of the same product, and finding that out on delivery is an expensive way to learn it.

Check the top of the range too. A great many novelty jumpers stop at XL, and a tradition that only works if everyone joins in fails badly when it cannot fit everyone. Ranges running to 3XL are worth favouring for that reason alone.

Leave time

The real problem with sizing is not the jumper, it is the calendar. A jumper that arrives on the 18th and does not fit is a jumper you are wearing anyway, because there is no time to exchange it.

Order by the end of November and a sizing mistake is an inconvenience. Order in the second week of December and it is the outfit.

Jumpers where sizing matters most