I ordered 5 shields as a initial order to try them out for our 3 restaurants. The smallest size aren't tall enough to protect diners. They only come up to your shoulder when seated so essentially useless. I contacted the company but they refused to allow me to return unopened packages to exchange them for a taller ones. The shield are cheap looking and will blow over easily. Zero customer service. Too many options out there to waste your time with this company. STAY CLEAR AWAY!