approx 10cm. Each bauble is made up of 4 main pieces. The back and 2 inner pieces are to be glued and painted. The front does not get glued on. The hanging ribbon will hold it together (not supplied) and enable you to open the bauble to put money, (coins or notes) inside…or small gifts like an engagement ring 😉 the inner section is 6mm deep. The 2 straight edge holes are used to thread ribbon and tie together once finished to stop the contents falling out and it is then ready to be gifted.