Mainstays 12 Cube Storage Organizer Bookcase, Black
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Mainstays

Mainstays 12 Cube Storage Organizer Bookcase, Black

760 ratings
Mainstays 12 Cube Storage Organizer Bookcase, BlackMainstays 11 12 Cube Storage Organizer BlackMainstays 11 12 Cube Storage Organizer Warm WalnutMainstays 11 12 Cube Storage Organizer Spring PineMainstays 11 12 Cube Storage Organizer White
Actual ColorBlack

Key item features

  • Flexible Cube Design: This 12-cube organizer features twelve 11" x 11" x 11" open storage cubbies. Used vertically or horizontally for flexible placement.
  • Dual Storage Options: Includes six open-back compartments for cord access and six closed-back compartments, ideal for storing books, clothes, and other items.
  • Sturdy Load Capacity: Constructed from manufactured wood. Top panel and two middle shelves support 22 lb each; bottom panel holds up to 33 lb.
  • Practical Dimensions & Safety: Measures 35.31" W x 11.73" D x 47.01" H. Includes hardware for secure wall attachment, suitable for various rooms.
  • Easy Assembly & Bin Compatibility: Assembly is straightforward with included instructions and video guide. Compatible with Mainstays 10.5" x 10.5" collapsible storage bins (sold separately).
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Customer ratings & reviews

4.3 out of 5 stars
stars
760 ratings135 reviews
How item rating is calculated
  1. 5 stars69% (524)
  2. 4 stars14% (105)
  3. 3 stars4% (29)
  4. 2 stars2% (18)
  5. 1 star11% (84)

Reviews summary

Pros

  • : Offers good value considering the cost.
  • : Requires minimal effort and time with clear instructions.
  • : Directions are simple and quick to understand.
  • : The unit assembles easily and tucks into awkward nooks.

Neutral

  • : Product supports light loads but is weaker than brand-name ones.
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Showing 1-3 of 135 reviews

Sep 4, 2026
Reviewer name: Kandace
Item details
Color: Warm Walnut
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Sturdy, great price.. good deal!

We stacked two of them and put them at the end of the hall, perfect fit for this awkward nook and now we've got tons of toy storage and spots for decor. These are heavy, nice and sturdy and come with the anchors you need to secure them. Great buy! (Just pay attention to the wood grain on the backing and make them all the same way… my husband didn't do that😅) Easy and quick build though at a great price!

Helpful?1CSRI6872B2Y13960062297
Sep 1, 2026
Reviewer name: Cindy
Item details
Color: White
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Great shelves!

We have had one of these for many years to keep our 13 grandkids toys in. Since then we have gotten rid of the toys since they are older. I bought this one, my husband added a top %26 a bookshelf on each end %26 now it is a part of my studio craft table!! These shelves are so versatile.

Helpful?1CSRI6872B2Y13960062297
Sep 11, 2026
Reviewer name: SDgirl
Item details
Color: Warm Walnut
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

perfect for storage

nice color and good size. didn't take me long to build

Helpful?1CSRI6872B2Y13960062297
Current price is $64.88
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