Read beyond the thread-count number
A large number on the packet does not describe the whole sheet. Compare like fabrics before using thread count as a deciding factor.

What the number leaves out
Thread count describes the number of threads in a measured area of woven fabric, usually a square inch. It does not tell you the depth of a fitted corner, the smoothness of a seam or whether the sheet will be easy to dry in your home. Those omissions are quite important when the biggest print on a packet is a number.
A useful comparison starts with sheets of the same fibre and similar weave. Putting a cotton percale beside a different blend in a different construction and selecting the larger count skips several decisions. Look for a clear material composition first. Then find the weave, dimensions and washing instructions. If the seller provides only the count and a photograph, ask for the missing information.
Be cautious about treating one threshold as the dividing line between good and bad bedding. The Company Store's sheet guidance also treats thread count as only one consideration. Your preference for a light, crisp or more substantial fabric cannot be reduced to a single figure.
Compare the whole packet
Write down what is included in the set. One listing may include a flat sheet and two pillowcases; another may contain only a fitted sheet. Check whether the stated dimensions refer to the mattress or the cloth itself. A fitted sheet with an inadequate pocket will pull off the corner regardless of the number on its label.
In person, inspect the hem and the elastic. Pull the fabric gently across your open hand, without stretching or damaging shop stock, to see its weight and drape. Look at how evenly the stitching runs. For an online order, close-up pictures of seams and a clear fabric description are more helpful than repeated claims about luxury.
Consider your usual wash load as well. A substantial sheet may feel appealing when folded but occupy more of a small drying rack. In humid weather, changing the entire household to heavier bedding can create a drying problem that was not visible in the product image.
Suppose two sets have the same advertised count. One gives a clear cotton composition, weave and pocket depth, while the other describes only a cotton-rich fabric. They are not yet equivalent choices. Find the percentage of each fibre in the second set and establish whether its dimensions suit the mattress. The matching number does not resolve either question.
A sensible tie-breaker
Once two options match your dimensions, preferred weave and care routine, thread count can help describe their differences. It should not overturn those earlier requirements. Keep a note of the particular sheet you choose and how it behaves after washing. That record is more useful for the next purchase than remembering only that you bought the highest number in the shop.
Make a short comparison card
For two shortlisted sets, write one line for each: fibre composition, weave, fitted depth, included pieces and care method. Put the thread count at the end. This makes omissions visible. If one seller supplies detailed dimensions and another supplies only a striking number, the second listing still needs questions answered.
Compare the price of the pieces you will actually use. A large set with spare pillowcases is not necessarily better value if those cases fit none of your pillows. The thread-count claim should not distract from an incomplete set or an unsuitable size. Keep the comparison narrow enough that you are choosing between two workable options, rather than collecting ever larger numbers.
Read a very large claim carefully
If a count seems unusually high compared with otherwise similar products, ask the seller how it has been specified. Do not invent a calculation from a magnified photograph or assume that every seller is using identical reporting conventions. A clear answer is useful; an answer that merely repeats the number adds no information about fit or feel.
You can leave an unclear option off the shortlist. There is no obligation to settle an entire textile debate before buying a bedsheet. Choose from products whose construction, dimensions and care requirements are adequately described. Once those conditions are met, a sample or a familiar range may be a more reliable guide to your own comfort than another numerical comparison. Record the exact range name, since a brand may offer several different fabrics under closely related names.