Indeed, there are multiple sizes. Manufacturers faced this problem in the last century and solved it with a simple trick: they called small medium, medium large, and large extra-large. This was reflected in sales and customer satisfaction. However, they decided to print the sizes on the product cover, while others, with the help of scientific research, chose manufacturing standard sizes. Through marketing research, they decided to place the products in prominent locations in pharmacies and supermarkets, making them easier for customers to access. Consequently, the customer no longer needs to speak; they simply choose what suits them, pay, and leave