Diabetes is diagnosed in two forms - type 1 and type 2 diabetes. Both can have long term implications for the feet, due to neuropathy (nerve damage) and poor circulation. It is crucial that a podiatrist or foot health practitioner examines and treats your feet on a regular basis if you have been diagnosed with diabetes. Footwear should preferably be professionally fitted but if this is not possible, then you must look for the following:-
Shoes are long enough for your feet (remember your big toe is not always the longest toe) - have around a 8-10mm gap before the end of the shoe.
The shoes should not be tight in width, as if they are you can develop corns and the blood flow will be restricted which could cause an issue.
If you have any joint deformities such as a bunion, ensure that there are no seams across the joint to rub.
Peak pressures underneath the feet can be relieved by a cushioning, rolling sole and this is very important to help minimise the risk of a foot ulcer.
Always remember to examine the bottom of your feet on a daily basis, to look for any signs of changes in your skin condition.