Architectural One-Seat Sofa With Intersecting Upholstered Forms

Some chairs occupy a corner. This one appears to have hired an architect, submitted drawings, and declared the corner an independent residence. Haesi’s Gyeolgu Sofa 1 Seater is a low upholstered lounge chair with chunky intersecting shapes, the sort of furniture that makes your ordinary armchair look like it arrived without a plan.

The Korean-made one-seat sofa has a broad horizontal seat, upright padded arms, and a low backrest. Rather than blending everything into one continuous cushion, it makes those separate pieces obvious. The seat even projects past the arms on either side. It is a strangely satisfying detail, like a very comfortable construction puzzle whose final step is sitting down and ignoring your phone.

There is a specific design idea behind that arrangement. As described in Yanko Design’s coverage, Gyeolgu draws on the relationships between parts in traditional Korean hanok construction. That influence is expressed through the upholstered forms. It does not mean you are buying exposed timber joinery or a chair that assembles like a tiny historic building.

A one-seat sofa with very serious elbows

The arms do much of the visual work. They are tall padded slabs with softened corners, extending nearly to the floor instead of sitting on top of a conventional sofa base. From the front, they frame the sitting area. From the side, you can see the horizontal seat crossing their line. Your elbows have rarely received such a substantial architectural welcome.

Haesi’s light upholstery photographs make the construction particularly easy to read. Shadows define the meeting points, and the rounded edges keep the whole thing from looking like a stack of shipping crates. There is also a small glimpse of wood at the bottom. The result is orderly without being entirely stern, which is more than can be said for most meetings held before coffee.

The real appeal is that the silhouette remains interesting from several directions. A chair pushed tightly between a sofa and a cabinet would hide much of that work. Give it some breathing room and it becomes a deliberate object in the room, rather than another padded destination for the laundry you were definitely about to fold.

Measure the corner before naming it your reading nook

This is sold as a one-seater, but the overall footprint is substantial. Haesi lists it at 1,200 millimeters wide and 1,020 millimeters deep. That is roughly 47.2 by 40.2 inches. Those are exterior measurements, not the amount of clear sitting space between the arms, so do not use the full width to estimate how many people can squeeze in.

The overall height is 670 millimeters, about 26.4 inches, while the seat height is 410 millimeters, around 16.1 inches. That gives it a noticeably low profile. It could make sense in an open lounge arrangement where you want furniture to feel grounded, though anyone who prefers a higher perch should pay particular attention to that seat measurement.

Published measurement	Metric	Approximate inches
Overall width	1,200 mm	47.2 in
Overall depth	1,020 mm	40.2 in
Overall height	670 mm	26.4 in
Seat height	410 mm	16.1 in

Before committing, mark that rectangle on the floor and keep the surrounding walkway in mind. Furniture photographs are excellent at making large objects look polite. A taped outline has no such agenda. It will immediately tell you whether this is a generous reading corner or a stylish obstacle course between the kitchen and the remote.

Plan around the full outside footprint, including the seat sections that extend beyond the arms.
Check the low seat height against the furniture you already find comfortable.
Allow space to see the side profile if the intersecting design is what attracted you.
Keep a separate surface nearby for drinks; the padded arms are not advertised as tables.
Ask about delivery access and the chosen upholstery before settling on a configuration.

The architecture is padded

Under the upholstery, Haesi specifies an E0-grade engineered wood frame and high-resilience polyurethane foam of varying density. The seat uses a spring-free, full-foam construction. So the visible geometry may suggest building blocks, but the materials list still belongs firmly to upholstered furniture. There is no need to bring a hard hat to your afternoon reading session.

Those specifications describe how it is made; they do not tell every buyer how soft it will feel. Foam density and the shape of the chair are only part of the sitting experience. If you can try it in person, do. If you cannot, ask Haesi about the feel and return terms before treating a beautiful photograph as a personal comfort guarantee.

Haesi lists performance fabric and vegan leather among the upholstery choices, with bouclé available through its Haesi Define offering. Each material changes how the big simple shapes read. A smoother finish emphasizes the outlines, while the textured bouclé makes the surfaces themselves more noticeable. It is the furniture equivalent of choosing between a neatly pressed jacket and a very expensive sweater.

The standard leg specification is solid pine with stained oil finishes. Haesi Define also lists solid walnut, solid oak, and black-finished oak options. Because much of the chair sits close to the ground, the feet are a small detail rather than the star of the show. Still, that little strip of wood is worth coordinating with the rest of a room.

Choose the finish as carefully as the shape

The site describes the performance fabric as easy to clean, but buyers should get care guidance for their exact selection. That phrase is not a personal invitation to challenge the chair with spaghetti sauce. Ask about cleaning methods, swatches, and the upholstery available for your order. Photos can show texture beautifully while still being unreliable guides to the precise color under your own lamps.

A quiet room gives Gyeolgu’s unusual outline room to register. It does not need a novelty cushion to explain the joke. In fact, covering it with a large throw would hide some of the overlapping structure that makes it different. This is a chair for somebody who wants a functional seat and also enjoys occasionally staring at the seat when nobody is using it.

Product: Haesi Gyeolgu Sofa 1 Seater, made in Korea.
Design: Low lounge seating with distinct intersecting upholstered forms.
Structure: Engineered wood and polyurethane foam, with a spring-free full-foam seat.
Upholstery: Performance fabric, vegan leather, and Haesi Define bouclé options.
Footprint: About 47.2 inches wide by 40.2 inches deep.
Ordering: Contact Haesi for the current configuration, quote, and delivery arrangements.

Haesi’s official page lists a starting price of ₩2,100,000 in its main specification section, while another section on the same page shows ₩2,800,000. The company also notes that Define material and finish choices can change the base price. Confirm the current quote directly with Haesi, along with shipping and any destination-specific costs, rather than assuming either displayed figure is your delivered total.

Product details and inline images come from Haesi’s official Gyeolgu Sofa 1 Seater page. It is a substantial amount of chair for one person, but sometimes one person would like a small upholstered building in which to read three pages and immediately fall behind on their plans.

Pros	Cons
Distinctive intersecting shape looks interesting from multiple angles.	The broad footprint requires more room than a compact accent chair.
Low overall profile can suit an open lounge arrangement.	The low seat and back may not suit every sitting preference.
Several upholstery and wood finish options are listed.	Exact selections and bespoke pricing need confirmation.
Published construction and dimensions help with planning.	Specifications cannot substitute for trying the seat.
Direct purchase inquiries are available through Haesi.	The page shows conflicting starting prices; obtain a current quote.