Histogram of the glitch size Δν of all glitches in our database. In the upper panel the error bars correspond to the square root of the number of events per bin. The middle and lower panels show the best fits with one, two, and three Gaussians. Magnetar glitches were not included in the latter panels nor in the fits. The solid and dashed lines represent the best fits and their components, respectively. The shaded region indicates that glitches of sizes smaller than 0.01μHz may be missing due to detectability issues.