Givenchy Vintage Single Breasted Navy Blue Blazer Suit Jacket

Givenchy Vintage Single Breasted Navy Blue Blazer Suit Jacket - no size to be found but please see measurements to ensure a good fit. I believe it's a size 40 or 42 but can't be 100% sure. Also there is no fabric tag but I believe it's wool due to the "Union Made U.S.A." tag. Single breasted 2-Button front closure 3-Button cuffs (non-functioning) 2 Front flap pockets, 1 breast pocket 3 Inside pockets Shoulder pads Chest 20" flat Length 30" Sleeve length 25" Shoulder width 19"