There are many names for these types of suits / tuxedos: Mandarin collar, banded collar, clergy collar, cossack collar are too name a few.
Men's Shirt - Buy Shirts For Men Online at Killer Jeans
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Striped Green Wool Blend Suit & Beige Vest, HolloMen
Men Tuxedo Blue and Orange, AlbertoNardoniStore
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New Look skinny suit jacket in off white
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Mandarin Collar Suit Suits Outlets Men's Fashion
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29 Types of Suits for Men: The Guide to Suit Styles - Hockerty