Paper comes in a multitude of size, weights and colour.
Below is a handy guide to these sizes and what to look out for to get the right paper for the right job!
PAPER WEIGHTS (grams) :
GSM or GM refers to the Grams per Square Metre. The higher the value the thicker the paper. Standard everyday papers are usually 80gsm. For presentations etc weights of 90g, 100g or 120g are recommended.
There is a wide variety of colours available to match any application you may have. The general rule of thumb is the lighter the colour the cheaper the paper.