I had my temporary crowns put in today. Nine front teeth. Why are my temporary crowns so big and bulky? (photo)

Hi:The temporary crowns can definitely be re-shaped rather easily.  I suggest you voice your concerns to your dentist right away so that the lab can use the reshapened temporary as a model of future work.  However, how your temporaries look does not necessarily reflect the final work.Best,Dr. Maddahi

Hi, thanks for write... The good about this is just your temporary not permanent, so, your doctor could fix and correct any of this things before do the permanent crowns. Good luck. 

A trained and experienced cosmetic dentist will be able to reshape the temporaries to your satisfaction and then take an impression of the desired shape to send to the lab for duplication (ideally a digital scan, like iTero, is done and emailed to the lab so they can duplicate without risk of temps coming off during an impression).  If the teeth did not have enough reduction in tooth structure, a good lab will be able to create prep guides (reduction copings) to help adjust the teeth prior to final cementation.But this IS a bit of "cart before the horse."  A better method would have been to plan how you would like to look, have the lab create a diagnostic waxup of the plan, and the temporary (prototype) would look like the final case.  If these steps were skipped, the final result is a bit of a prayer.