The box says 6 months onwards. Although baby bites is technically supposed to melt in the mouth, I would be hesitant to give that at 5 months, especially as the first edible thing, for fear of choking. Babies’ gums can be quite strong, and a piece may break off the biscuit and cause choking. There are other teether biscuits that don’t dissolve, that you may want to try instead:)
Cherlyn