Wheel Size for Frame

I am getting towards the business end of my singlespeed build : http://buildingabicycle.tumblr.com/

And I think my frame takes 700c wheels but I am not sure and I want to check. Is there a way I can measure to know whether I need 27" wheels or 700c wheels etc. ?

Thanks

dont worry , sorted it on another forum

glad you sorted it. Great write up of the build, it's coming along nicely!

Ah thanks very much mate :)

remember 700c and 27" need their own size tyres and inner tubes. saw you've already ordered 700c tyres.
The problem will come with brake drop, chances are your frame WILL want 27" wheels, but generally the only ones available are low end dutch bike style 27" wheels.
Another issue with wheels, spacing, what space do you have between the F&R dropouts? I would say your rear will be 120 or 126mm.
THe other type of spacing is chainline, if you get a rear wheel that is intended for a 5-8spd screw on freewheel you WILL be able to put your SS freewheel on, but the chain line will be terrible, the chain will frequently de-rail/ be dangerous. Solutions: buy a rear wheel with the correct dish/spacing in the first place, or buy 5pd+ freewheel wheel, then pay a bike shop to re-space/new axle/re-dish the wheel.