If you've ever bought one of those big Costco Kleenex boxes and tried to slip a tissue box cover over it, only to realize it doesn't even come close to fitting, you're not alone. It's one of the most common emails we get from customers at Midtwenty.
The short answer: most tissue box covers are made for standard rectangular or square Kleenex boxes. Costco's 230-count Kleenex boxes are noticeably larger, and the covers built for "regular" tissues just won't work. You need an XL cover designed for the bigger footprint.
Here's a full guide on how to find the right one: what to measure, what to look for, and our top pick for 2026.
Why standard tissue box covers don't fit Costco Kleenex
Most tissue box covers on the market are sized to fit one of three formats:
- Standard rectangular boxes (Kleenex 100-count, Puffs 56-count): roughly 9.4″ × 4.7″ × 3.4″
- Square cube boxes (Kleenex 65-count, Puffs Cube): roughly 4.5″ × 4.5″ × 5″
- Smaller travel-sized boxes: vary widely
The Costco Kleenex boxes are a different size class entirely. They're rectangular like the standard boxes, but significantly larger, closer to 10.5″ × 5.3″ × 4.5″. The extra width and height mean a standard cover won't go over the top at all.
What size are Costco Kleenex boxes?
The two most common Costco Kleenex boxes are:
- Kleenex Ultra Soft 230-count: approximately 10.5″ × 5.3″ × 4.5″
- Kleenex Trusted Care 230-count: same approximate dimensions
Costco store-brand (Kirkland Signature) tissue boxes tend to be the same size class, give or take a quarter-inch. If your box is in this range, you need what's commonly called an XL or large rectangular tissue box cover.
What to look for in a Costco-size cover
Not every "large" tissue box cover is actually sized for Costco boxes. A few things to check:
- Internal dimensions, not external. A cover that's 10.5″ externally won't fit a 10.5″ box. You want internal dimensions at least 10.7″ × 5.5″ so the box slides in with a little breathing room.
- Open-bottom design. The easiest format for swapping boxes: lift the cover, drop a fresh box in, set the cover back down.
- Material that lasts. Plastic covers should be matte-finished, lightweight but rigid. Avoid anything that flexes when you pick it up; it'll crack at the corners.
- A finish that matches your space. This is where most generic XL covers fall short: they look industrial. The whole point of using a cover is to hide the ugly box, so the cover itself should actually look good.
Our pick for 2026: the Midtwenty XL Fluted Tissue Box Cover
We make a large fluted tissue box cover sized specifically for Costco Kleenex boxes. Internal dimensions are slightly oversized so the box slides in cleanly, and the open-bottom design makes refills painless.
Here's why we think it's the best option on the market right now:
- Sized correctly for the Costco 230-count. It also fits same-size Kirkland and other store-brand boxes.
- Modern fluted design. Blends into contemporary, minimalist, and Scandinavian-inspired rooms rather than calling attention to itself.
- Matte-finish plastic. Durable, lightweight, easy to wipe down. Doesn't yellow over time.
- 13 colors. Match your bathroom, living room, bedroom, or office.
- Made in Kentucky, USA. Small-batch and hand-finished in our studio.
It's a piece you can buy once and use for years. The kind of small home upgrade that quietly improves a room every time you walk into it.
Where the XL Fluted cover works best
A few rooms where customers tell us it works especially well:
- Master bathrooms with bigger counter space, where the standard tissue box would look proportionally small.
- Family rooms or living rooms where a Costco box gets used quickly, so you want something pretty in plain sight.
- Home offices where a tissue box sits on the desk and you don't want it to look like an office-supply afterthought.
If your room is on the smaller side and a Costco box would feel oversized, take a look at our standard-size tissue box covers. Same fluted and arch designs in the right proportions.
How to measure your tissue box before buying
If you're not sure whether your box is "Costco size" or "standard size," here's a 30-second check:
- Lay the box flat on a counter.
- Measure the longest side (this is the length).
- Measure the shorter side (this is the width).
- Measure the height from counter to top.
If your length is 10″ or more, you need an XL cover. If it's around 9.4″ or less, a standard-size cover will do.
(For a deeper dive on box sizes, we wrote a full tissue box cover sizing guide that walks through every common format.)
Frequently asked questions
Does the Midtwenty XL Fluted cover fit Puffs boxes?
Most Puffs boxes are standard size, too small for the XL cover. Use our Standard Fluted Kleenex Box Cover instead.
Will it fit the larger 72-count Puffs box?
The 72-count Puffs box is between standard and Costco size. Measure before buying: if your box is under 10″ long, the XL is too big.
Is the cover sturdy enough for a household with kids?
Yes. The matte plastic is lightweight but rigid. Customers report theirs surviving years of small hands without cracking.
Can I clean it?
Yes. Wipe with a damp cloth and mild soap. Avoid abrasive cleaners, which can dull the matte finish.
Where is it made?
Kentucky, USA. Designed and finished in our studio.
The takeaway
If you've been hunting for a tissue box cover that actually fits your Costco Kleenex boxes, the problem isn't you. Most covers on the market are built for standard-size tissues. Look for one with internal dimensions of at least 10.7″ × 5.5″, an open-bottom design, and a finish you'd actually want on display.
Our XL Fluted Tissue Box Cover is built specifically for this. If you have questions about sizing or colors, reach out. We love hearing from customers.