KPop Demon Hunters Costumes: 9 picks from £7.99

The size most of these titles give you is Age 6+, which says where the fit begins and nothing about where it ends. Only the Rubies Deluxe Rumi Golden entries name a closed band, one at Age 7-8 and one at Age 9-10, and the prices do not follow the ages: the 7-8 is £22.92 while the same Deluxe in Age 6+ is £24.94. So if your child is around seven, the precise size costs less than the vague one. Check the measurements on the seller's page, because these titles will not settle it for you.

Rubies puts the Rumi outfit under three names here, Classic, Deluxe and plain Rumi, and not one title says what the Deluxe adds or what the Classic leaves out. The Classic at £16.99 is the least you can pay for a Rumi costume on this page, against £24.99 for the plain Rumi. Since the wording never explains that gap, compare the photos on the two listings and judge from those.

Not everything on this page is the Netflix outfit. Atorcher's Stage Performer Costume Set names no character and no film, and it is sized 3-12 years, a long sleeve coat with shirt and "pants" in the seller's own word. Tangsenyu's 3PCS set names Rumi but not Netflix; the Official Netflix wording appears only in the Rubies titles. The BAISEBAOFU purple braid clip-in extensions at £7.99 are hair, something you add to a costume rather than a costume itself. And if you want a character other than Rumi, Mira at £24.99 is what there is.