I have a pagebock table governed by a wrapper class and im having trouble adjusting some of the column widths.

This is my table on the VF page:

 <apex:pageBlockTable value="{!contractList}" var="c" id="table" rendered="{!NOT(ISNULL(contractList))}">
            <!-- The 'selected' property in the ContactWrapper class -->
            <apex:column width="20px" headervalue="Cancel?" >
            <apex:inputCheckbox value="{!c.selected}"/>
            </apex:column>
            <apex:column width="20px" headervalue="Cancel Date" >
            <apex:inputText value="{!c.cnclD}"/>
            </apex:column>
            <apex:column width="20px" headervalue="Customer Policy Purchase Price" >
            <apex:inputText value="{!c.price}"/>
            </apex:column>
            <!-- The contact fields within the ContactWrapper -->
            <apex:column value="{!c.tContract.Vin_Number__c}" style="text-align: center"  width="105px"/>
            <apex:column value="{!c.tContract.Effective_Date__c}" style="text-align: center" width="95px"/>
            <apex:column value="{!c.tContract.Full_Name__c}" style="text-align: center" width="140px"/>
            <apex:column value="{!c.tContract.Product_Group__c}" style="text-align: center" width="85px"/>
            </apex:pageBlockTable>
            </apex:pageBlock>

 For the fields within the wrapper I am able to adjust the widths on, however, for the checkbox and input fields I cannot adjust thiers and I need to because the way the table is rendering at the moment shoves the other fields off the portion of the page it's meant to display on and it's causing a problem aside from not looking very good.  So, is there any way to adjust the three fields causing the problem I haven't accounted for?  Because at the moment they're running into each other and screw up the flow of the page.