Large Self-Inking Blue Shield Stamp Every office needs an assortment of self inking medical stamps to make communication more efficient. This self inking doctor office stamp features the phrase Blue Shield and does not require the use of a separate stamp pad. The size of the Self Inking Blue Shield Rubber Stamp is approximately 7/8 x 2-1/4 . The actual imprint style is displayed above. This Self Inking Blue Shield Rubber Stamp is available in 12 exciting colors to choose from