You can use large eggs to substitute - see chart inside:
EGG SIZES - EQUIVALENTS
(NOTE: An extra large egg has about 4 tablespoons of liquid and a large egg has about 3 1/4 tablespoons of liquid).
Two large = two jumbo, two extra large or medium, or three small
Three large = two jumbo, three extra large or medium, or four small
Four large = three jumbo, four extra large, five medium or small
Five large = four jumbo, four extra large, six medium, or seven small
Six large = five jumbo or extra large, seven medium, or eight small