The standard weight for vinyl records varies amongst manufacturers, but is generally around 40 grams for 7 inch, 100 grams for 10 inch, and 125 up to 150 grams for 12 inch records. Anything heavier than 125 grams is generally considered "heavy" weight.
Hand Drawn Pressing offers 140 gram as our STANDARD WEIGHT for 12 inch records and 180 gram (via- Custom Quote).
180 gram is often referred to as "audiophile" quality, as it's more substantial weight makes the product more durable against scratching and warping. However, audio quality between 140 and 180 is typically not varied, as the mastering, plating and stamping processes are identical.