· 7 min read
Plus-size onesies: the styles that go up to XXL and 3XL
Plus-size onesies: the Family Fleece Onesie in Men 3XL, the Monster Pyjamas and Pumpkin Onesie in XXL, the Monkey Kigurumi in XL up to 189 cm.
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- big and tall mens onesie
- mens kigurumi large size
- plus size kigurumi women
- mens 3xl onesie

A plus-size onesie, in this shop, goes up to Men 3XL: that's the largest size of the Family Fleece Onesie, designed for 180 to 185 cm and 90 to 100 kg. The Monster Pyjamas and the Pumpkin Onesie go up to XXL, and the Monkey Kigurumi stops at XL, but an XL designed for up to 189 cm. No style comes in 4XL or above. Here are the largest sizes of each style, taken from their product pages, followed by how to measure yourself and what to know before ordering.
The largest sizes, style by style
Three styles go beyond XL: the Family Fleece Onesie (up to Men 3XL), the Monster Pyjamas and the Pumpkin Onesie (up to XXL). The others stop at XL, with very different guidelines from one product page to the next.
| Style | Largest size | Guideline on the product page |
|---|---|---|
| Family Fleece Onesie | Men 3XL | 180–185 cm, 90–100 kg |
| Monster Pyjamas | XXL | 170–180 cm and over |
| Pumpkin Onesie | XXL | usual size, unisex cut |
| Monkey Kigurumi | XL | 178–189 cm |
| Star Monster Kigurumi | XL | 177–185 cm |
| Shark Kigurumi | XL | 165–178 cm, 70–85 kg |
The Giraffe Kigurumi, the Crocodile Onesie, the Monster Bunny Faux Fur Pyjamas, the Big Mouth Monster Pyjamas and the Cable Knit Teddy Bear Onesie also stop at XL, with no body measurements on their product pages (the cable knit gives the garment's own).
The letter isn't enough: the XXL of the Monster Pyjamas starts at 170 cm, whereas the Men XXL of the Family Fleece Onesie is aimed at 175 to 180 cm and 80 to 90 kg. Compare your height, and your weight when the product page asks for it, with the table for the style you've chosen.
Men 3XL: the Family Fleece Onesie
The Family Fleece Onesie is the only style in 3XL, and the only one whose men's sizes combine height and weight. It's a one-piece onesie in thick, plush fleece, with a roomy cut and a full-length zip. It comes in five animals: panda, ginger tiger, brown bear, dinosaur and capybara.
| Size | Height | Weight |
|---|---|---|
| Men L | 165–172 cm | 63–69 kg |
| Men XL | 170–175 cm | 70–79 kg |
| Men XXL | 175–180 cm | 80–90 kg |
| Men 3XL | 180–185 cm | 90–100 kg |
For women, this style's women's sizes stop at XL, designed for 160 to 168 cm and 60 to 70 kg. Beyond that, the men's sizes take over: it's the same onesie, with the same animal.
In XXL: the Monster Pyjamas and the Pumpkin Onesie
The Monster Pyjamas and the Pumpkin Onesie are unisex and both go up to XXL. The first is chosen by height, the second by your usual size.
The Monster Pyjamas, from S to XXL
The Monster Pyjamas are a one-piece onesie in thick 100% polyester fleece flannel, with a hood featuring horns, little ears and big embroidered eyes. They come in nine colours: green, blue, red, black, white, yellow, purple, beige and pink.
| Size | Your height |
|---|---|
| S | under 150 cm |
| M | 150–160 cm |
| L | 160–165 cm |
| XL | 165–170 cm |
| XXL | 170–180 cm and over |
The product page gives no weight. It describes a deliberately roomy cut and advises taking the larger size if you're between two.
The Pumpkin Onesie, from S to XXL

Photo: Captain-tucker / Wikimedia Commons (CC BY-SA 3.0)
The Pumpkin Onesie is made of orange coral fleece, soft, thick and light, with a pumpkin embroidered on the front pouch pocket and a shaggy monster-head hood. Its product page gives no measurements: it describes a unisex cut, long sleeves and straight legs, and advises taking your usual size, or the next size up if you're unsure. Our article on the adult pumpkin onesie covers it in more detail.
For the tallest: the Monkey Kigurumi and the Star Monster
If you're taller than 185 cm, the Monkey Kigurumi in XL is the only style designed for up to 189 cm. Its sizes are based on height alone: S for 148–158 cm, M for 158–168 cm, L for 168–178 cm, XL for 178–189 cm. Between two sizes, the product page recommends the larger one.

Photo: Giles Laurent / Wikimedia Commons (CC BY-SA 4.0)
It's a brown fleece onesie with a beige front panel, a long tail at the back and a monkey-head hood. The product page describes it as very roomy at the hips, with press studs all the way down the front, so you can pull it on over pyjamas or a T-shirt.
The Star Monster Kigurumi, in black fleece, also goes up to 185 cm in XL (177–185 cm). Its roomy cut is the same from kids' to adult sizes. The Shark Kigurumi stops lower: its XL is aimed at 165 to 178 cm and 70 to 85 kg.
How to measure yourself before ordering
Two measurements are enough for most product pages: your height, plus your weight for the Family Fleece Onesie and the Shark Kigurumi.
- Height: barefoot, with your back and heels against a wall, lay a book flat on top of your head, mark the wall, then measure from the floor to the mark.
- Weight: only needed for the product pages that give it. If your height and weight put you in two different sizes, go for the larger one: a one-piece that's too short pulls at the shoulders and crotch as soon as you sit down.
- Chest: needed for the Cable Knit Teddy Bear Onesie, whose product page gives the garment's measurements laid flat, up to a 122 cm chest in XL. Compare them with your own chest measurement while allowing some room: the cut is designed to be roomy.
No product page gives an inside leg length. Our guide to choosing the right adult onesie size explains how to take your measurements, and onesie or Monster Pyjamas compares the cuts.
If the size doesn't fit
When you buy online, the law gives you at least 14 days to change your mind (Service Public, “Distance selling: the consumer's right of withdrawal”, in French). In this shop, the period starts from receipt: write to the shop with your order number to get the return address. Return postage is at your own cost. The details are on the delivery and returns page.
For the Monster Bunny Faux Fur Pyjamas, the product page states that they are made to order and asks you to check your size carefully before ordering.
Wearing a roomy onesie safely
A plus-size onesie often has long legs and wide sleeves: turn up the legs if they trail on the floor, especially on the stairs. With slippers on, a leg that hangs over your foot gets caught more easily.
Fleece and flannel should be kept away from flames. The London Fire Brigade reminds us never to place a candle near anything that can catch fire, clothing included, and presents LED candles as a safer option (London Fire Brigade, “Candles”). For washing, follow the product page: 30 °C on a delicate cycle and air drying for the Family Fleece Onesie, the Monster Pyjamas, the Pumpkin Onesie and the Monkey Kigurumi, and our article on how to wash and care for fleece pyjamas covers the rest.
In a nutshell
For a plus size, the Family Fleece Onesie goes up to Men 3XL (180–185 cm, 90–100 kg), for women too. The Monster Pyjamas and the Pumpkin Onesie go up to XXL, and the Monkey Kigurumi covers the tallest heights, up to 189 cm in XL. Whatever you choose, trust the table on the product page rather than the letter. Every style is in the shop, with free delivery.
Cover photo: Charles J. Sharp / Wikimedia Commons (CC BY-SA 4.0)
