Any pocket pair 1 in 17
Individual pocket pairs 1 in 221
Any particular pair of values, suited 2 in 663 (1 in 331)
Any particular non-pair values (not necessarily suited) 8 in 663 (1 in 83)
Chance that your opponent has a pair when you also do, heads up 1 in 72. Chance the opponent has a pocket pair when you do not, 1 in 73.