Like Ashley said, it's fairly gradual. Do you have a scale that measures in grams? If not, you should invest in one. They're only about $20 and will let you monitor your snakes weight. Just as an idea (all snakes will grow at different rates), my female weighed 64g in November 2015. Now, August 2016, after 9 months of feeding her 10-15% of her body weight every 6 or 7 days, she is about 590g. Her first few months she gained fairly gradual. Now, it seems like she's growing like crazy. lol