Go to the links below and give your size. The tool will convert clothes size from one country to another. If you are from India, Pakistan, Bangladesh Srilanka and other South Asian countries, you fall under 'Continental, Europe'.
Men's Clothing Conversion Women's Clothing Conversion
If you are buying apparel from Amazon.com, here is the sizing chart to look at Amazon Sizing Chart
Glove Size
Have you been to Sears/Kohls and found Gloves for 50% sale? Most likely you would have but if you buy them without checking your size, they are going to be a pain. Use this Glove Sizer to find out your size before picking up that 'One Size Fits All' glove pair. All it takes is just a print out.
Glove Sizer
Ring Size
I had mentioned in my About page about finding out your ring size. Here is the way. It is pretty simple, but I bet you didn't stumble upon this before. Just print the following pdf file and find your size.
Now, this is definitely something to be called a 'techie' ;-).