Yes. Every module is available to purchase individually at any time. Add modules to expand your configuration or choose a new fabric to change your look.

Yes. Start with a 2-seater and add a corner or ottoman when you move somewhere larger. Each new module connects directly with no modification.

Alligator clips screw into the base of each piece, locking modules together firmly. They hold securely under daily use and release easily when you want to reconfigure.

We also supply non-slip pads to
Use them on their own or add a hold on slippery floors.

Under five minutes. Unclip, move, reclip. No tools. One person can rearrange a full 3-seater comfortably.

2-seater, 3-seater, L-shape, U-shape, or any custom arrangement. The system is open so you arrange modules to suit your space.

Yes, as long as you select the same fabric colourway. Covers are cut from the same production run and the colour consistency across orders is tight. If you are adding modules more than 12 months later we recommend ordering a swatch first to compare before purchasing.

Pearl (like Chenille): velvety

Clay, Haze. (like Linen) : woven texture.

Recycled Moon &Juniper (like Bouclé): ultra soft, made from 370 recycled bottles per sofa.

All five have removable washable covers. Linen shows marks less visibly. Bouclé is the most forgiving with everyday wear.

Yes. Each module takes its own cover. Order swatches to test combinations before committing.

Every screen displays colour differently. We strongly recommend ordering a free physical swatch before purchasing.

Yes. Each Bouclé cover is woven from yarn spun from post-consumer PET bottles — 370 per sofa. The recycled content is verified under the Global Recycled Standard and the fabric passes OEKO-TEX Standard 100, confirming no harmful substances carry through from the recycling process.

Yes. Replacement covers for every module and colourway are available individually at any time. If a cover wears, fades, or you want to change the look of your sofa, you can update it without replacing the sofa itself.

See the Dimensions button above for full measurements. You can add to cart from there.

Studio: 2-Seater. One bed: 3-Seater. Townhouse: 4 or 5-Seater.

Multilayered foam. Soft on the surface, supportive underneath. Top layer softens over the first two to three weeks. Core holds shape long term.

Each module is rated to 150kg static load. The hardwood frame is built to exceed typical residential use across the 5-year warranty period. If you have a specific load requirement, contact us before purchasing.

The 44cm seat height is on the higher end of the residential sofa range, which makes standing up easier than a low-slung design. If you need specific ergonomic advice, contact us with your requirements and we will give you an honest answer.

64cm seat depth. That is enough to sit cross-legged or recline with legs extended on a chaise. It is intentionally deeper than a standard office-style sofa because the Comma is built for living rooms, not waiting rooms.

30-day returns. Original condition. Flat-rate fee: $300 sofa pickup, $75 small parcels. Refund within 5 to 7 business days.

5-year warranty on frame,, and construction.

3 Years on Foam

1 Year on all fabrics.

Email hello@1721.com.au with order number, description, and photos. We assess within 2 business days.

Just keep it in the condition you received it. Normal use during the trial period is expected and perfectly fine.

The warranty is registered to the original purchaser and does not transfer to a subsequent owner. If you sell or gift the sofa, the new owner would not have warranty coverage.

Document it immediately on delivery. Photograph the packaging and the damage before the delivery team leaves. Email hello@1721.com.au within 24 hours with order number and photos. Transit damage is covered and we will arrange replacement or repair at no cost to you.

Yes. Afterpay and Zip at checkout. All standard methods also accepted: Visa, Mastercard, Amex, Apple Pay.

At the time of order, not dispatch. This secures your configuration and places you in the delivery queue.

Yes, if not yet dispatched. Email hello@1721.com.au. Full refund within 3 to 5 business days.

Yes. All transactions are processed through Shopify Payments, which is PCI DSS Level 1 compliant, the highest level of payment security certification. Seventeen Twenty-One does not store or access your card details at any point.

Currently, Afterpay and Zip are the two instalment options at checkout.

Yes. A confirmation email is sent immediately after payment. It includes your order number, configuration summary, and estimated dispatch window. If it does not arrive within 10 minutes check your spam folder, then contact us.

Pearl, Clay, Haze: Cold wash, mild soap, air dry in shade.

Moon, Juniper: Cold handwash, mild soap, air dry in shade.

Follow our guide for warrant and ease.

Blot immediately. Do not rub. Spot clean or remove the cover and wash. Covers come off in minutes so you can be washing within five minutes of a spill.

Minor pilling can occur in the first few weeks. Use a fabric shaver or lint roller.

Bouclé is the most likely due to its curled texture.

Avoid sustained direct sunlight. Use sheer curtains for strong afternoon sun. Lighter colourways show fading less visibly.

Lifts off with a lint roller on all five fabrics. Woven polyester is more resistant to claw pulls than natural fibres. Replacement covers available individually.

The Comma itself is not independently certified. Our factories and fabric suppliers are. Between them, they hold six verified certifications:


SC for responsible timber, OEKO-TEX Standard 100 for chemical-safe fabric, Higg Index for environmental impact, REACH for EU chemical compliance, Global Recycled Standard for verified recycled content, and ZDHC for zero hazardous chemical discharge.

Approx 370 plastic bottles are woven into every Recycled Bouclé cover.

The fibres are OEKO-TEX certified, meaning no toxic residue carries through from the recycling process.

Yes. The solid hardwood frame is FSC certified, meaning the timber is traceable to responsibly managed forests. No engineered wood or MDF is used in the primary structure.

Traditional sofas are replaced as a whole unit when one component fails. With the Comma, you replace only what needs replacing, a single cover, one module, not the entire piece. That is the core of our sustainability argument: longevity by design.

Our delivery team removes all packaging on the day. Cardboard is recycled and wrap materials are consolidated. Nothing is left for you to dispose of.

Yes. Covers,, alligator clips, and individual modules are stocked.

We design for repairability, not replacement cycles.

Click the Swatch button on any product page, select your colour or colours, and add to cart. Swatches ship free. No purchase required.

You can order one swatch per colourway in a single request. If you need additional samples email hello@1721.com.au and we will sort it.

Standard Australia Post delivery. Sydney typically 2 to 4 business days

Every screen calibrates colour differently. What appears sage green on one device may look warmer or cooler on another. Physical swatches are the only accurate reference. We strongly recommend ordering before purchasing.

Yes. Each swatch is a cut section of the production fabric. You can feel the bouclé loop, the linen weave, and the chenille pile before committing. Screen renders cannot replicate tactile texture.