Pyjama Monstre — hooded monster onesies for adults, in soft flannel



The Monster Pyjamas in motion
Our customers' favourite monsters
New this season
Pick your monster
Free shipping on every onesie
Our trusted classics
Questions we get asked
Who is a monster onesie for?
For every grown-up kid: your other half, a brother or sister, the colleague you drew in Secret Santa, the friend who loves a pyjama party… From S to XXL it fits women and men alike — the present that gets a laugh when it's unwrapped and then gets worn all winter.
Which size should I choose?
Go by the wearer's height: S under 150 cm, M for 150–160 cm, L for 160–165 cm, XL for 165–170 cm, XXL for 170–180+ cm. Between two sizes? Take the larger one — the cut is deliberately roomy. Every style has its own size guide on its product page.
Is it a costume or real pyjamas?
Both! The horned, big-eyed hood steals the show at a party, but the thick fleece flannel makes it above all a proper loungewear piece — warm, comfortable and machine washable. A fun one-piece you keep wearing long after the party.
Sizing, care, delivery… every answer is in the product page FAQ.
Free delivery
Tracked, to France and abroad
14-day returns
2-year legal guarantee
Secure payment
By card, via Stripe
Got a question?
contact@pyjamamonstre.fr, customer service by email























