need help about Transformer

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hi to all
i want to make a transformer
my freind gave me the details,but in my country they use different size scales for the bobbin and the E I

these are the details given

Core to be used is E-I core of CRGO grade , size of core is 7. And the stack is 3 inches.Bobbin will be a split bobbin

can anyone plz clear to me about the sizes
i attached picture to write to me about measurments plz
thz in advance
An externally hosted image should be here but it was not working when we last tested it.
 
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