We know, it's one of the most embarrassing moments of your life. 

Do you make an appointment to be fitted? Do you just go in and take your top off? Will she see EVERYTHING?!

So many questions! 

But, unfortunately a lot of women are in the dark about the right bra size – and in this case, ignorance is certainly not bliss. 

It will become sore, dig into your sides and leave you with unflattering red marks. 

So, if (like many) you're unsure about wearing the right bra size, here are some fool-proof ways to tell.

1. You have bulges galore.

2. The back of your bra is riding high.

3. Quardra-boob!

4. Your straps leave a last impression.

5. Your cups are only half-full.

6. Your straps are falling down. 

If you have any of these signs, we're afraid it's time to say so-long to your bestie.