With Pay Pal payments Standard, you cannot send the email on the confirm page, since this page posts to the paypall servers.
The email needs to sent on the checkout success page when using paypal standard, I would recomend sticking with Paypal pro.
to send the option details to paypal, edit the eCart object and create a new calculation on the calculation tab.
Set the Type of the new calculation to text and the name to "NameOptions", the calculation should be:
[Name] . ' Color:' . [colorColumnName] . ' Size:' . [sizeColumnName]
Next on the Conform Page, find the following code:
$PP_DirectPayment_itemized[0][$nextIndex] = "Name" . strval($cartIndex+1) . "";
$PP_DirectPayment_itemized[1][$nextIndex] = "".$WA_Store_Cart->DisplayInfo("Name") ."";
and change it to:
$PP_DirectPayment_itemized[0][$nextIndex] = "Name" . strval($cartIndex+1) . "";
$PP_DirectPayment_itemized[1][$nextIndex] = "".$WA_Store_Cart->DisplayInfo("NameOptions") ."";