If you are taller than average, then you probably have a hard time using regular mats. Your body is likely to protrude on the edges so you won’t get as much support as you need. You can adjust your position on the mat but there will always be trade-offs. Consider purchasing a long yoga mat instead.
Find one that allows you to lie down comfortably so that horizontal poses won’t be an issue. At the minimum, the mat should also be able to accommodate your width from shoulder to shoulder. If it feels too narrow, then get a wider mat.
You can find extra large options online. Some of these can go as long as 8ft or 9ft. They can also go as wide as 6ft. Many will use these for partner yoga but you can always use it by yourself to enjoy the space.
