Apparently Barry Bonds’ HR total wasn’t the only thing expanding the last few years .

* His cleat size, incredibly, has grown from 10½ to 13.

* His jersey size has ballooned from a slim 42 to a hefty 52.

* And his cap size has expanded from 7 1/8 to 71/4.

These revelations are included in the new afterword to “Game of Shadows,” the BALCO tell-all by SF Chronicle reporters Lance Williams and Mark Fainaru-Wada. .

“The changes in his foot and head size,” they wrote, “were of special interest: medical experts said overuse of human growth hormone could cause an adult’s extremities to begin growing.”

pat.reichart@nypost.com