What Bike Size Frame (Fixie road bike) Do I Need?

Im 5"7-5"8, Not completely sure. I weigh 135-150 avg.(My weight changes pretty quickly [depending on me being active or not] ) Im getting a road bike (Fixie) in a couple of months. • CROMOLY FRAME • SEAT TUBE: 530MM OR 480MM • HANDLE BAR: 23.5" • 46 TOOTH ALLOY LASCO FIXIE ORIGINAL CRANKS... show more Im 5"7-5"8, Not completely sure. I weigh 135-150 avg.(My weight changes pretty quickly [depending on me being active or not] ) Im getting a road bike (Fixie) in a couple of months.

• CROMOLY FRAME
• SEAT TUBE: 530MM OR 480MM
• HANDLE BAR: 23.5"
• 46 TOOTH ALLOY LASCO FIXIE ORIGINAL CRANKS 1/8×170
• FLIP/FLOP ALLOY HUB WITH 16TOOTH FIXED COG
& 16 TOOTH FREE WHEEL
• CRANKSET: ALLOY/BLACK 1/2*1/8*44T*170MM
• WHEEL: 700C X 25C, 43MM DEEP RIMS
• TIRES:700 X 25C, BLACK

Now i just need my frame size, (I know nothing about bikes I copied the bike Info from the website^)
It says I have a choice between 480mm or 530mm? Im not sure which one is for me. If you know the answer please answer with a little detail and an explanation to why! Thank you very much!
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