HEAD TO HEAD · SEPTEMBER 8, 2026
DUMOS vs Yomsum
105″ Modular Sectional, Left Chaise against 96″ L-Shaped Cloud Sectional. Both are foam-built couches sold on Amazon; the differences that decide it are footprint, what the seller documents and how each is configured.
THE SHORT ANSWER
DUMOS or Yomsum?
DUMOS suits a room with space for a 105″ chaise and a buyer who wants Amazon.com as seller. Yomsum suits a shorter wall at 96″ wide. The listed depths differ by 31.8″ (66.14″ against 34.3″), though Yomsum's figure looks too shallow to include its chaise and needs checking first.
DUMOS 105″ Modular Sectional, Left Chaise
105″ W × 66.14″ L × 22.44″ H; 105 lb
DUMOS offers a 105-inch left-facing chaise, and at research time it was sold by Amazon.com rather than a marketplace seller. The listing itself is unusually bare: no foam, no fabric, no expansion time and no care label are published at all.
- Choose it for: A 105-inch layout with a left-facing chaise, listed on Amazon.
- Check first: This listing publishes dimensions and little else — no foam, fabric or expansion detail. Ask the seller before ordering.
Yomsum 96″ L-Shaped Cloud Sectional
96″ W × 34.3″ L × 23.6″ H; 99 lb
Yomsum is a 96-inch L-shape with an exact Amazon listing and a left-facing chaise. Beyond the dimensions, the colour and a two-carton shipment, the listing publishes nothing: no foam, no fabric, no expansion window.
- Choose it for: A 96-inch L-shape with an exact Amazon listing we could match.
- Check first: Almost nothing is published beyond dimensions and colour. Treat the specification as unverified.
DECIDE FOR YOUR HOME
Which one fits how you live.
Pick DUMOS if
- you want Amazon.com as the seller, as it was at research time.
- a beige left-facing chaise suits the room and you can spare 63″ on a 14-ft wall.
- you want a listed depth of 66.14″ that already reads like a chaise footprint.
Pick Yomsum if
- your wall is 12 ft and you need the 48″ of spare length a 96″ width leaves.
- a black left-facing chaise suits the room.
- the sofa is for a secondary room or a rental rather than the main seat in the house.
Room and delivery check
- Width: DUMOS 105″, Yomsum 96″, 9″ apart. On a 14-ft wall they leave 63″ and 72″. On a 12-ft wall, 39″ and 48″.
- Listed depth: DUMOS 66.14″, Yomsum 34.3″. The bounding boxes come to 48.2 and 22.9 sq ft, or 28.7% and 13.6% of a 12×14 ft room, but Yomsum's number may leave the chaise out.
- Overall height is close: 22.44″ for DUMOS and 23.6″ for Yomsum. Seat height is not published for either.
- Weight: DUMOS 105 lb, Yomsum 99 lb. Yomsum ships as two items. DUMOS's box count and both expansion times are not published.
Risks to clear before ordering
- A 34.3″ depth on an L-shape with a chaise looks like a conflicting spec. Plan the room only after Yomsum's seller confirms the chaise length.
- Yomsum was sold by a third-party seller at research time, so check opened-box eligibility and return freight. DUMOS was sold by Amazon.com.
- Neither listing names its foam or upholstery, so foam recovery and cover cleaning cannot be judged from the page.
BEFORE YOU ORDER
Questions to send both sellers.
- Yomsum: does the 34.3″ depth include the chaise, and if not, how long is the chaise?
- Yomsum: is an opened, expanded sofa eligible for return, and who pays return freight?
- DUMOS: what foam and fabric does the 105″ sectional use, and is the cover removable?
- DUMOS: how many boxes does the 105 lb sectional arrive in?
- Both: what is the seat height, and how many hours does the foam need to expand?
HOW WE COMPARED
Desk research, not a living-room test.
We have not sat on either couch. This comparison works from the DUMOS and Yomsum listings, seller policies and any attributable owner feedback, checked on September 8, 2026, with this pair analysis revised on October 17, 2026. Dimensions and materials are seller claims; the room and delivery figures are our arithmetic from those claims.
Where they differ
Rows where both models state the same thing are hidden. Seller claims, not independently measured results.
| The deciding detail | DUMOS | Yomsum |
|---|---|---|
| Configuration | Beige · left-facing chaise | Black · left-facing chaise · two cartons |
| Listed dimensions | 105″ W × 66.14″ L × 22.44″ H; 105 lb | 96″ W × 34.3″ L × 23.6″ H; 99 lb |
| Returns | Standard Amazon returns when sold by Amazon.com; confirm the seller at checkout | Third-party seller on Amazon; confirm opened-box eligibility |
| Setup | Not published on the listing | Ships as two items; expansion time not published |
| Price & availability | Check price on Amazon ↗ | Check price on Amazon ↗ |