What is the normal range of an overbite/overjet?

1mm to 2mm: Normally about 1 to 2 millimeters for each.

Two different things: Overbite is the extent of vertical overlap of the maxillary central incisors over the mandibular central incisors. Normal range is 2-3 mm. Overjet is the horizontal distance between the maxillary anterior teeth and the mandibular anterior teeth. Normal range is 2-3 mm.

2-3 mm.: Normal overjet is 2-3 mm and a normal overbite is 20%. This means that the upper teeth in the front are 2-3 mm in front of the lower front teeth. Overbite is the vertical distance of the upper teeth over the lower teeth. A normal overbite has 20% of the lower teeth covered by the upper front teeth.

2 mm: 2 mm overjet is normal, with 1-2.5 within normal limits. 2 mm overbite ( 0-50% is WNL. If you're concerned, ask a qualified Orthodontic Specialist.