size of hex

[thines900]

i have a hex tank thats huge but im not sure what size it is the guy i bought it from said it was an 85 gallon but im not sure cause ive searched on the internet and have not found anyone who makes an 85 gallon hex. the sides are each 16" x 28"
any ideas on how many gallons it is

 

[wontonflip]

Measure it all around, and go here:

Fish Aquarium and Tank  Sizes and Characteristics, starting an aquarium, buying equipment, choosing tanks