To make the correct measurement for your feet width, Please follow bellow process:
1.Press the feet on the floor, let the feet endure the body weight. Your feet situation should be same when you wear the shoes and walking.
2.Take the soft ruler to measure the circumference of the widest portion of your feet. (around your feet , see the above measurement picture)
3.Please tell us which Euro size usually wear, we can take that as making reference
The heels are normally available on boots. Also, they should not be too slim or else it'll not be able to support the wearer stably. If it's really impossible that you just walk in black platform heels, then don't worry since you could always select the people which don't have heels.