I designed this universal  Round Knife Block for my kitchen. 

By using 3mm x 150 mm wood/ bamboo sticks this knife block is quite adaptable. - Any knife fits. 

You can Tape some rubber down to the bottom for secure stand. 

I bought 3mm x 150 mm wood sticks on amazon. You will need about 900 of these sticks to fit inside. Maybe you can also use some mikado-sticks. So far I can not say if it is better to use flat- or pointed-sticks. Maybe someone could tell me in the comments. 

Have fun printing this thing and do not forget to share some love!