database structure for multiple options on products - mysql

Question

I have products in my database (MySQL).
I have my prices based on different combinations of options for my products.
I have the following data:
PRODUCTS
prodID | prodName
1 | Ball
OPTIONS
optionID | optionName | prodID
1 | color | 1
2 | size | 1
3 | material | 1
OPTIONVALUES
ovID | optionID | ovValue
1 | 1 | red
2 | 1 | blue
3 | 2 | small
4 | 2 | big
5 | 3 | wood
6 | 3 | glass
for prices I would like to have like this:
red small wood ball - $13
red small glass ball - 14
red big wood ball - 16
red big glass ball - 17
blue small wood ball - 12.5
[...]
How can I design the database structure for this?
I have tried several ways but none was good. if the number of the options were static then every option could have its own table, but this was that is not a good solution.

Answer 1

I like what you already have. If you want it to be fully flexible as i guess you do, i would do the following:
Add two more Tables.
Product_Instance
instanceID | prodID | price
1 | 1 | 13
Product_Instance_Options
instanceID | ovID
1 | 1
1 | 3
1 | 6
In this way you could define all possible combinations and prices for them. Might be a hell of a lot work to set up all the prices, but if you cant calculate them (like glass = +2$, small=2$ / big=4$) you will have this however you do it.

Answer 2

How about something like this:
productTypes
prodID | prodName
1 | Ball
2 | Car
productInstances
prodInstanceID | prodID | Prize
1 | 1 | $19
2 | 1 | $50
3 | 2 | $8
properties
propertyID | propertyName
1 | color
2 | size
3 | material
propertiesValues
pvID |propertyID | propertyName
1 | 1 | red
2 | 1 | blue
3 | 2 | small
4 | 2 | medium
5 | 2 | large
6 | 3 | wood
7 | 3 | glass
productProperties
ppID | prodInstanceID | pvID
1 | 1 | 1
2 | 1 | 3
3 | 1 | 6
4 | 2 | 2
5 | 2 | 4
6 | 2 | 7
7 | 3 | 1
8 | 3 | 3
9 | 3 | 6
In your design you can't determine which option belongs to which product instance. If you look at your table optionvalues, there is no way to group together your options.