BILLY Arch Inserts

One size, two BILLY widths

Mirrored inserts fit open BILLY bookcases without doors: Narrow 40 cm / 15.75 in and Wide 80 cm / 31.5 in. No width selection is needed. The same pieces meet at the centre on Narrow BILLY, while a straight gap remains between the rounded corners on Wide BILLY.

What is included

Each complete arch contains two mirrored pieces: one left and one right. Choose 1–6 arches (2–12 pieces). Pre-applied double-sided adhesive is included on every piece. Bookcases, shelves and décor are not included.

Peel, position and press

Clean and fully dry the mounting surface. Test-position both pieces before removing the backing. Align with the front edges, then press firmly along the adhesive. Strong adhesive may affect some finishes during removal; adhesion depends on the surface condition.

Material & colour

Made from solid-colour matte PLA using 3D printing. Fine layer lines, small seams and minor surface variations may be visible. Dark Brown and Light Beige are coordinating solid colours, without wood grain. An exact match to IKEA furniture is not guaranteed; colours vary with lighting, screens and furniture batches.

Care & visible joins

A centre seam on narrow bookcases and fine 3D-print layer lines are normal. Dust with a soft cloth; if needed use a slightly damp cloth and dry immediately. For indoor decorative use. Keep away from heaters, high temperatures and prolonged strong sunlight.

An independent accessory

Designed by FURNIX3D, not made by, sponsored by or affiliated with IKEA. IKEA, BILLY and KALLAX names describe compatibility only. Furniture, original hardware and decorative items are not included.