Which is the correct phrase, "pair of shoes" or "pairs of shoes"? How are they used?

All other answers explain that "correct" is singular and "correct" is plural. Although this is correct, "pairing" is sometimes used as plural in North American dialects (in the UK, Quora users point out in comments). For example, I bought three pants and six socks.

This is not standard, I do not intend to teach people who use this language to learn English. We do not recommend using it in writing. But in some dialects, spoken English is fully accepted.

According to the Google Ngram viewer, Google N-gram viewer and Google N-gram viewer are more popular than "correct" in the late 18th century as plural of "pairing" and have since lost their popularity since then. I heard it in a small village in Michigan in the 1970s, but I have not heard so recently.

In informal North American English, there are people who use pairing as plural, that is, three pairs of shoes. This is considered wrong in written English.

When used without qualifiers, pairs are the only possible plural: skater pairs slide on ice. Fixing with numbers is a more common form, especially for people. In other words, six pairs of mask dancers lead the parade. Complex pairs that are not marked are mainly used to refer to inanimate objects or non-human objects. He has three pairs (or pairs) of loafers

Therefore, I will not say that "three trousers" is incorrect. It is outdated, but it is still used in several places

Wearing running shoes is not easy. You can not enter a store and buy a pair. Tracking shoes are custom made. So he and his track and field director went searching for a pair of abandoned pairs. His coach found a pair of right shoes and a pair of left shoes. They come from various sneakers of various sizes, but considering the time limit, this is the best option. One shoe is suitable and the other shoe is too big. So Jim wearing two pairs of socks to fit the big shoes.

In 2006, he founded a one-on-one footwear company donating a pair of shoes for each pair of TOMS, bought girls. Since its founding, the company has donated over 60 million pairs of shoes. It is wonderful to think that people and their simple solutions may affect the lives of so many people.

You decided to buy new shoes. You open up Google, navigate to your favorite shoes website, and stay on their homepage for a while. The banner image is very attractive, but where is the button that allows you to find the pair you want? Can not be a small box in the middle of the image. Ghost buttons, buttons with colored border but no fill are very common on the web. Use the name "ghost" to represent transparency. Because the color is not filled, I am watching the background (usually photos). But whenever I see them, I have no choice but to ask: did the designer test these buttons? Perhaps this is the reason behind the optimization of the conversion rate, or is it unevenly distributed in modern web design? Either way, I have a problem.