How do i find the measurements of my eyeglasses?

[discount glasses]

How do i find the measurements of my eyes, bridge, and temple(for eyeglasses)?
I need new glasses in urgent and i would like to order them online in order to have a wide variety of choices and price discounts. However, i do not know what size my eyes bridge and temple are. how can i find these measurements?

[prescription eyeglasses]

On the inside of the frame, you will see numbers that tell you the frame measurement of your existing frame.
The temple/arm length is usually written on the inside of one of the temples. The number is usually between 125 and 145, and represents the full temple length (including the bend) in millimeters (mm).
The eye size and ?nose bridge measurements are sometimes stamped in that same place, and are either separated with a dash ( - ) or a small box between the number.