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 typically available on boots. Moreover, they shouldn't be too slim or else it'll not be able to support the wearer. If it's really impossible that you simply walk in black platform heels, then tend not to stress since you could always choose the ones that don't have heels.