diymore Atmega328P Prototyping Prototype Shield ProtoShield + Mini Breadboard with 170 Tie Points Prototype Size:7cm x 5.5cm x 2cm. Mini breadboard size: 4.4 x3.4 x1cm. The mini breadboard has 170 tie points. 1 reset button, 1 general use button, and 2 LED circuits can be used directly. The breadboard sticks on the prototype shield with its self-adhesive backing.