I have strings such as 

```
70x100 CM
70x140 CM
70x70 CM
72x120 CM
70x130x70 CM
70x75x70 CM
72x72 CM

```

When I want to sort in this order:

```
70x70 CM
70x75x70 CM
70x100 CM
70x130x70 CM
70x140 CM
72x72 CM
72x120 CM

```

this is my code:

```
ORDER BY CAST(CAST(eaov.value AS DECIMAL(3,0)) as UNSIGNED INTEGER), eaov.value

```

Any ideas?