Oversized King Sheets: How to Fit a Wyoming, Texas, or Alaskan King Bed

You splurged on a giant bed, got it up the stairs, and then hit the wall every store runs into: regular King bedding doesn't come close to covering it. If you've been hunting for oversized King sheets and coming up empty, you're not imagining it. Beds like the Wyoming, Texas, and Alaskan King use dimensions most brands simply don't make. Here's how the sizes actually break down and how to get sheets that fit the first time.

What counts as an "oversized King"

"King" has quietly become a family of sizes, not one size. The standard King (sometimes called an Eastern King) is 76" wide by 80" long, and the California King trades width for length at 72" x 84". Everything past that is oversized territory, and the names come from US states and provinces rather than any standard labeling.

Here's how the real measurements compare, smallest to largest:

A few things jump out. The Wyoming King sheets you need cover a square bed that's 8 inches wider than a standard King but the same length. The Texas King sheets have to handle an extra 18 inches of length for tall sleepers. And the Alaskan King is in a category of its own at 9 feet by 9 feet, which is why Alaskan King sheets are almost impossible to find on a shelf. If you're still deciding between a standard and oversized setup, our king size bed sheets guide and the California King sheets guide break down the smaller end.

Why regular King sheets won't work

It's tempting to buy a King set and hope it stretches. It won't, and here's the practical problem. A fitted sheet's pocket is sewn to a fixed perimeter. On a Wyoming King, a standard King fitted sheet comes up 8 inches short across the width, so it either won't go on or pops off the corners by morning. On an Alaskan King, you're asking a sheet built for 76 inches to cover 108. The math doesn't bend.

Flat sheets fail the same way. A King flat sheet leaves bare mattress on an oversized King and has no drop left to tuck. That's why SGI cuts and stitches every oversized King sheet to the exact mattress footprint rather than selling a one-size-fits-most and hoping. If a sheet somehow doesn't fit, the 100% Fit Guarantee means they remake it.

Which fabric for an oversized King

On a bed this big you feel the fabric choice more than usual, because there's simply more of it touching you. SGI makes oversized King sheets in three main builds, and they split cleanly by what you want:

• ✓600 thread count cotton (from $87.99). The everyday pick. Crisp, breathable sateen that holds up to constant washing. The 600TC oversized King sheet set is where most people land.
• ✓1000 thread count Egyptian cotton (from $115). The luxury tier, with a silkier sheen and a five-star-hotel hand. The 1000TC Egyptian cotton oversized set is the one to buy if softness is the priority.
• ✓Bamboo viscose (from $114.99). The cooling option. Moisture-wicking and naturally temperature-regulating, which matters when two or three people share the bed. See the bamboo oversized sheet set.

If you're torn on cotton numbers, the short version is that higher thread count buys softness and sheen, not durability past a point. Our thread count guide walks through where the real differences are. All three builds come in a 4-piece set (one flat, one fitted, two pillowcases) and nine colors: White, Butter, Light Grey, Dark Grey, Taupe, Burgundy, Navy Blue, Black, and Moss.

Our Pick

1000TC Egyptian Cotton Oversized Set

• Fits Wyoming, Texas, Alberta, and Alaskan King
• 15" deep pockets with 360° all-around elastic
• 4-piece set, 9 colors, 100% Fit Guarantee

From $115.00

Shop the set

Getting the fit right

Two measurements decide whether a sheet fits: the mattress footprint and its depth. SGI's oversized King sheets are cut to each named size, so the footprint is handled as long as you pick the right size at checkout. Depth is the part people forget. Measure your mattress from the top seam to the bottom, and if you use a topper or a pillow-top, measure with it on. SGI's fitted sheets come with 15" deep pockets and 360-degree elastic, which covers most thick and pillow-top mattresses.

If you only need to replace one piece, you don't have to rebuy the whole set. There's a standalone oversized King fitted sheet and a matching oversized flat sheet. And since a bed this size is an investment, it's worth protecting with an oversized mattress protector cut to the same dimensions. More on that in the mattress protector guide.

Keeping them soft, wash after wash

Oversized sheets are big, so a few habits help. Wash cotton on a warm or cool cycle with a mild detergent, skip the fabric softener (it coats the fibers and dulls the finish over time), and tumble dry on low. Pulling them out slightly damp and smoothing the corners saves you most of the ironing. SGI's cotton is machine washable and fade-resistant, and it genuinely softens with each wash rather than wearing out.

A few common questions

What size sheets do I need for a Wyoming King?

A Wyoming King mattress is 84" x 84", so you need Wyoming King sheets made for that square footprint. A standard King set (76" x 80") will not fit. SGI lists Wyoming King as its own size on every oversized set.

Are Alaskan King and Alberta King the same?

No. Alberta King is 96" x 96" and Alaskan King is 108" x 108", so they take different sheets. The Alaskan is the largest size, which is why Alaskan King sheets are the hardest to source elsewhere.

Will regular King sheets fit a Texas King?

No. A Texas King is 80" x 98", which is 18 inches longer than a standard King. You need Texas King sheets cut for the extra length, or the flat and fitted sheets will both come up short.

What if the sheets still don't fit?

Every SGI oversized set carries a 100% Fit Guarantee, which means they remake it if it doesn't fit. Measuring your mattress depth before ordering is the best way to get it right the first time.