The best non-surgical methods to achieve a smaller face include:
1. Jaw botox - to reduce the size of your chewing muscles (masseter muscles). These jaw muscles might contribute to a rounder face.
2. HIFU Ultraformer - to melt cheek fat at high settings.
However, if it's due to your bone structure, you might need to consider jaw surgery. Buccal fat removal surgery can also help to reduce cheek fats.
Hope this helps!
Warm regards,
Dr Justin Boey