MarMar onesies for babies and toddlers in Pima cotton

MarMar onesies are for you if you are looking for a footless one-piece suit for a baby or young child and want something that can do a little more than a regular pyjama. Here you will find MarMar onesies and baby one-piece suits that are especially popular for children from newborn up to around 2 years. What makes MarMar special is the simple Copenhagen design, the GOTS-certified organic Pima cotton and the fine ribbed edges, which help the suit keep its shape even when it is worn and washed often.

This is a category many parents turn to when the fabric, size and fastening need to make sense in everyday life. Some choose a style with a front opening because it is practical for quick nappy changes, while others prefer the classic version. The colours are usually calm and timeless, such as off-white, dusty green, navy, grey melange and soft pink, making it easy to find a MarMar onesie that fits beautifully into the rest of the baby wardrobe.

Why many parents choose MarMar onesies over other brands

MarMar is especially known for its organic Pima cotton, a cotton quality with long fibres. In everyday use, this often means the fabric feels extra soft, looks smooth and neat, and stays beautiful for longer than many standard cotton qualities. That is exactly the difference many parents notice when a suit is reached for again and again for sleep, sofa cuddles and quiet mornings.

The ribbed edges at the wrists and neckline are also worth noticing. They are not only a lovely detail, but also help the fit, so the suit does not lose its shape too quickly. Together with the clean lines and small, discreet details, you get the calm Scandinavian look MarMar is known for. If you already know the brand, you can also explore the full MarMar universe and find more styles in the same aesthetic.

Which size MarMar onesie should you choose?

Size is often the part that needs a little extra consideration, because small children grow quickly and the fit matters a lot in everyday life. MarMar onesies are typically available from size 50/56 to 98/104, and the best choice depends on your child’s length, build and how much room for movement you prefer.

As a simple rule of thumb, you can use this as a guide:

• 50/56 and 62/68: good for newborns and the first months, when a gentle fit and easy access for nappy changes are especially helpful.
• 74/80 and 86/92: good for babies who sleep, crawl and move more during the day.
• 98/104: for bigger toddlers, where it is important that the suit allows room for play while still staying neat at the knees, legs and cuffs.

If your child is between two sizes, it is often better to look at your child’s measurements in centimetres rather than age alone. This makes it easier to choose a suit that will not immediately become too short, but is also not too roomy around the body and legs.

MarMar pyjamas and onesies for everyday use

A footless MarMar onesie can be used in more ways than you might first think. Because it has no feet, it is easy to adjust with socks or wool socks when a little extra warmth is needed. This makes it comfortable to use for much of the year, whether for naps, slow mornings or calm days at home.

For the youngest children, MarMar onesies work well as a soft base for sleep and quiet moments. As your child grows, a footless suit is practical because the feet are free, making it easier to crawl, pull up and move around. If you want to build a simple wardrobe in the same soft materials and calm look, a onesie can easily be worn with a bodysuit or combined with more styles from the MarMar one-piece suits category.

Material and care matter even more with MarMar onesies

When choosing MarMar onesies, the fabric plays an important role. GOTS-certified Pima cotton is chosen for its softness, breathability and durability, and this is especially noticeable in clothing worn close to a child’s skin. To preserve both shape and colour for as long as possible, gentle washing is recommended. A wash at 40°C is usually a safe choice, while higher temperatures may wear the fibres more than necessary.

This is also where MarMar shows its strength in everyday life. Ribbed edges and a carefully considered fit make the suit suitable for frequent use and many trips through the washing machine. As a parent, that gives a reassuring feeling when clothes need to withstand regular wear without quickly looking worn out. If you are looking for more responsible choices in the same direction, you can also find inspiration in our selection of nightwear and underwear for children.