Finite volume effects in chiral perturbation theory

There has recently been an intense activity in the study of finite volume effects by means of chiral perturbation theory. In this contribution I review recent work in this field both for the ε- (MπL≲1) and the p-regime (MπL≫1). For the latter I emphasize the importance of going beyond leading order calculations in chiral perturbation theory and the usefulness of asymptotic formulae à la Lüscher used in combination with CHPT.