How to choose a paving pattern
There are no hard and fast rules. It depends on the style you are trying to achieve. Generally, if you want to create a traditional garden design, random patterns are the most effective. Limestone, slate and sandstone paving work well in traditional gardens and can be laid in either three or four flag patterns.
This is not to say that these types of natural stone cannot be laid in single-sized running bond or stack bond patterns. When you are trying to create an individual outdoor space, laying stone in a different pattern can really distinguish your garden from the rest. There is plenty of scope for different paving ideas in Indian sandstone patio designs. Mint sandstone, for example, looks stunning when laid in stretcher bond pattern using 900x600 size.