Viewing RAW images in photoshop

hi,
i am doing a project wherein i have to view the RAW images in photoshop to see if the desired effect is achieved in the image.
while viewing these RAW images, the length and breath of the images should be specified correctly, else the image is distoted.
sometimes i am not able to judge the exact height and width of the image, so can u guide as to how to judge it.

thanks for any help..

If you check the "Constrain Proportions" box, it should open at the right proportions. Typically when you open a file, PS will know the size of the file by reading the EXIF information and making a decision based on the pixel count. For example, a 3.0 megapixel picture is typically around 1984 x 1488 pixels (giving about 2.95 effective MegaPix). This can open in a range of sizes from 27.556" x 20.667" at 72 dpi to 6.613" x 4.96" at 300dpi.