Roos in Huis is an illustration and gift brand created by Roos, who makes cheerful, colorful designs using watercolor. Her hand-drawn illustrations feature across a growing collection of greeting cards and distinctive gifts, available through the online shop and in various stores. Cards cover occasions and themes including birthdays, births, flowers, sympathy, recovery, thanks, friendship, love, animals, Christmas, and Nijmegen and its Four Days Marches.

The shop also offers custom portraits, including personal family portraits, and birth announcements designed with individual details. Gift options include ceramic tiles, posters, mini cards, envelopes, stickers, keychains, frames, and Nijmegen souvenirs, as well as Four Days Marches gifts. Roos describes her work as a way to delight or move the recipient with a thoughtful, personal present.

Orders placed before 2 p.m. are dispatched the same day. Shipping is free from €35, with separate rates listed for letterbox and parcel delivery. Card discounts are automatically applied when buying multiple cards.