I made this dagger a while ago to fit a dragon armour set.

Length: 575mmHeight: 126,2 mmThickness: 26.5mm

For smaller 3d printers, I divided the model into 4 pieces (almost no support needed).The two blade sections can be printed upwards.The handle can be laid flat on the print bed (don't forget to mirror the model for the other side of the handle).

The sections can be put together with Dowel Pins (8mm x 40mm) to provide extra strength.