Most utensil holders are capable of holding around six large utensils. Based on this, you can check out the drawers and cupboards of your kitchen to decide how many utensil holders you think you need to buy.
You should think about how many items you have in your kitchen which could be stored in a ceramic utensil holder crock. If you have quite a large collection, you should consider buying more than one utensil holder and splitting the items between them.