According to Article 7 of Chapter 4 of the Provisional Regulations for Marriage Registration Work in 2016, the parties shall submit three 2-inch recent half body, bareheaded photos of both parties. So the size of the marriage certificate photo is 2 inches.
Official requirements for marriage registration photos
1. Three recent half body bareheaded red background photos of both parties, measuring 2 inches (width 5.3cm x height 3.5cm).
7. Filmed within the past 6 months.
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