All of the visible edges of the stone will be polished to match the face finish. So If you were to purchase a high gloss polished granite sign then the edges would follow suit.
Our standard edge profile would be a small 45 degree bevel measuring around 3mm across diagonal.
The edge profile can also rounded edges, hand pitched to give a natural riven/hand cut finish.
Please note that due to the nature of the material, slate signs are not suitable for pitched edges.