how to increase x-axis tick labels in ggplot2 code example

Example: size of ticks labels in r ggplot

# Changer l'apparence et l'angle d'orientation des étiquettes
p + theme(axis.text.x = element_text(face="bold", color="#993333", 
                           size=14, angle=45),
          axis.text.y = element_text(face="bold", color="#993333", 
                           size=14, angle=45))