Please make sure that you're taking the proper measurements before ordering a custom gown, sample gown, or even Ready-to-wear collection.
If you are between sizes make sure that you order a size larger, so you can get the size taken in. 
HOW TO TAKE YOUR OWN MEASURMENTS AT HOME
1.) GET A BODY / CLOTHING MEASURE TAPE
2.) YOUTUBE HAS VIDEOS ON HOW TO MEASURE YOURSELF CAREFULLY
3.) WRITE MEASUREMENTS DOWN
4.) OR YOU CAN CONSULT WITH YOUR LOCAL ALTERATION PROFESSIONAL FOR HELP
MEASURMENT TIPS
1.) ALWAYS STAND STRAIGHT WHEN MEASURMENTS ARE BEING TAKEN
2.) IF CONFUSED ABOUT BODY MEASURMENTS PLEASE GET MEASURED BY A LOCAL PROFESSIONAL TAILOR/SEAMSTRESS AT AN ALTERATION SHOP
3.) MAKE SURE TO WEAR THE UNDERGARMENTS YOU PLAN TO WEAR WITH YOUR GOWN/CUSTOM DESIGN.
4.)MAIN MEASUREMENTS: BUST, NATURAL WAIST, HIPS, HOLLOW TO HEM, ARM LENGTH.