1. Full-grain leather: This is considered the highest quality leather available. It is made from the top layer of the hide and retains the natural grains and imperfections, giving it a unique and durable character. Full-grain leather is known for its strength, breathability, and ability to develop a beautiful patina over time.

2. Top-grain leather: This is the second-highest quality leather and is often used for high-end footwear. It is slightly thinner than full-grain leather as the top layer has been sanded or buffed to remove any imperfections. Top-grain leather is still durable and has a smooth, soft feel.

3. Genuine leather: This is a term commonly used to describe any type of leather made from real animal hides. However, it is of lower quality compared to full-grain or top-grain leather. Genuine leather can still be suitable for shoes, especially if treated and cared for properly.

4. Suede leather: Suede is made from the underside of the hide and has a napped, velvety texture. It is not as durable as full-grain or top-grain leather, but it is often used for more casual or dressy shoe styles. Suede requires regular cleaning and maintenance to keep it looking good.

Ultimately, the choice of leather depends on your personal preferences, the intended use of the shoes, and your budget. It’s always a good idea to do some research, read reviews, and try on different types of leather shoes to find the one that suits you best.