I have all sizing and measuring information on this page How to Measure
Yes! if you take care of them and remove them correctly, you should be able to reuse them. I include application, removal and care instructions with all orders so you can get the most out of your nails.
With the proper nail preparation, application and care, they can last around 2 weeks and you can reuse them and reapply them again. I include instructions for all this so you can get the most out of your nails.