"Full," "double" and "queen" get used almost interchangeably online, which is confusing, because they don't all mean the same thing. Some of that comes down to which country's sizing system you're looking at.
Where the confusion comes from
"Full" is a US term. Australia doesn't really use it, here the equivalent is called a Double. Because so much bedding content online is written for the US market, "full" shows up constantly even in Australian searches, which is exactly why this gets confusing if you're shopping locally.
Is a full sheet the same as a double?
Close enough to be practically the same bed, with a small natural gap. A US Full mattress is 137cm wide by 190.5cm long. An Australian Double is 138cm wide by 188cm long. That's a small difference on paper, and it's exactly where the right material matters more than the exact number. Cotton jersey, like It-Fits uses, stretches, so whether a mattress runs a touch wider or narrower than the label suggests genuinely doesn't matter. Full and double are effectively the same bed, and the fabric handles whatever small gap remains.
Is a double the same as a queen?
This is one of the most common questions in the search data, and it's probably not really asking whether two specific sizes are identical. "Double bed" gets used loosely in everyday speech to mean any bed built for two people, so when "queen" turns up elsewhere, the real question is usually: is that just another name for the same thing, or genuinely bigger?
It's genuinely bigger. An Australian Double is 138cm wide. An Australian Queen is 158cm wide, 20cm more, not a small gap. A double sheet will not stretch to cover a queen mattress. The US versions differ by a similar margin too, a US Queen is 152cm wide against a US Full's 137cm.
What about king?
Worth knowing if you've bought sheets from an overseas brand before. An Australian King is 183cm wide. A US King is 193cm wide, 10cm wider again, because a US King is built from two Twin XL mattresses side by side. If a "king" sheet from a US brand ever felt loose on your Australian king bed, that gap is why.
Getting the right fit, wherever the confusion started
If your mattress genuinely doesn't match your country's standard size, longer, shorter, wider, narrower, there's still a workaround, and it has nothing to do with buying a bigger sheet and hoping. The fix is the fabric. A woven sheet has no stretch, so any gap between your mattress and the label becomes a real fit problem. A knitted fabric like jersey has natural give, so it absorbs that gap instead of fighting it. That one swap, woven to jersey, solves more sizing mismatches than chasing the exact right label ever will.
That's exactly the idea behind It-Fits, an Australian jersey brand built with 8cm of flex beyond standard sizing on top of that natural stretch. The Double fitted sheet is built to handle exactly that kind of small variance, whether your mattress reads as a US full or an Australian double. Need a different size, browse the full fitted sheets collection, or check the fitted sheet size guide for exact numbers.
"I am so very happy with these sheets. They stay in place even for the most restless sleeper," says Julie C. on the reviews page.
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