I was able to retrieve and post your pic for you. Are you sure on the 150 grams? She does look big enough and healthy to me though pictures are always hard to tell. She looks bigger than my Cleo and Cleo weighs 250 gr. And a small adult mouse once a week looks about right for yours. She certainly looks 3 feet or more in your picture as well. You have a very pretty girl there.
Edited: I just realized you said 105 and not 150 grams. Are you sure your scale was set to grams? 10.5 ounces equals 297.67 grams. That looks more like your snake's size from the pic. Is that possible?