Cologne 2015: Milan studio Skrivo has collaborated with Danish brand Soft Line to design a chair with a backrest that is inserted into the seat like a wafer in an ice cream. More about Skrivo's Halo chair comprises two parts that slot together
Stockholm 2015: Stockholm-based Note Design Studio has reduced the dimensions of a typical lounge chair so that this seat for Swedish brand Fogia will fit into increasingly smaller homes and offices. More about Sling chair by Note Design Studio is sized for compact spaces
Maison&Objet 2015: Spanish studio Mut Design has created a pair of chairs to look like masculine and feminine versions of the same seat. More about Mut Design launches "male" and "female" outdoor chairs for Expormim
Cologne 2015: black metal frames clamp folded cushions into shape to form seats in this collection by French designer Inga Sempé (+ slideshow). More about Inga Sempé's Beau Fixe seating is clamped into shape
Maison&Objet 2015: Basque designer Jean Louis Iratzoki has moulded the shell of a chair from a plant-based polymer that is fully recyclable and biodegradable (+ slideshow). More about Jean Louis Iratzoki designs "first bioplastic chair"
Stockholm 2015: Dutch designer Richard Hutten shaped this circular seat to mimic the way architects denote chairs on floor plans (+ slideshow). More about Architects' sketches of chairs influence Richard Hutten's seat for Offecct
Stockholm 2015: this wooden chair by British designer Jasper Morrison was created for use in a Tanzanian orphanage and will be sold to fund the centre's development. More about Jasper Morrison designs Kali chair to fund African orphanage
Northmodern 2015: Danish designer Simon Legald's seating range for furniture brand Normann Copenhagen draws inspiration from hundreds of chair designs throughout history (+ slideshow). More about Normann Copenhagen launches Form furniture by Simon Legald
Designers Jonas Edvard and Nikolaj Steenfatt have used a new material made from seaweed and paper to create a chair and a collection of pendant lamps. More about Seaweed and paper combine to create furniture
Koichi Suzuno and Alicja Strzyzynska of Torafu Architects have designed a children's seat that splits in half to reveal a dolls' house inside (+ slideshow). More about Torafu Architects hides dolls' house within a wooden chair
Cologne 2015: Munich design studio Formstelle has created a subtly patterned lounge chair for iconic furniture brand Thonet. More about Formstelle designs Lounge Chair 808 for Thonet with "wave effect" upholstery
Dutch architect and designer Gerrit Rietveld's Zig-Zag Chair is the final entry in our alphabetical advent calendar of iconic chairs. More about Dezeen's A-Zdvent calendar: Zig-Zag Chair by Gerrit Rietveld
The letter Y in our festive A-Zdvent calendar is represented by Hans J Wegner's CH24 chair, which is also known as the Y Chair because of its characteristically shaped back. More about Dezeen's A-Zdvent calendar: "Y Chair" by Hans J Wegner
The criss-crossing metal frame that gives this 1968 design the name X-Chair has helped it find its way into our A-Zdvent overview of classic chairs. More about Dezeen's A-Zdvent calendar: FK 82 X-Chair by Preben Fabricius and Jørgen Kastholm
With just two days until Christmas, today's offering from our A-Zdvent calendar is the cardboard Wiggle Chair by architect Frank Gehry. More about Dezeen's A-Zdvent calendar: Wiggle Chair by Frank Gehry
Made from almost 500 metres of rope, the Vermelha Chair by Brazilian designers Fernando and Humberto Campana is our A-Zdvent calendar's letter V. More about Dezeen's A-Zdvent calendar: Vermelha Chair by Campana brothers
The bulbous Up5 Chair by Italian designer Gaetano Pesce follows on from the 20 iconic seat designs we've already featured for our A-Zdvent calendar. More about Dezeen's A-Zdvent calendar: Up5 Chair by Gaetano Pesce
A staple in cafes around the world, Thonet's steam-bent No 14 chair is T in the alphabetical list of iconic seats we're publishing each day until Christmas. More about Dezeen's A-Zdvent calendar: Thonet No 14 Chair
As we head closer to Christmas with our A-Zdvent list of iconic seats, S is represented by Danish designer Arne Jacobsen's Swan Chair. More about Dezeen's A-Zdvent calendar: Swan Chair by Arne Jacobsen
Ron Arad said he "hardly designed anything" when creating his readymade Rover Chair, which is next up in our festive A-Zdvent calendar. More about Dezeen's A-Zdvent calendar: Rover Chair by Ron Arad