29 Gallon fuge-dimensions for acrylic

I have this sump design...just need to kno what size pieces of acrylic to get

or if there is a better design with inside demensions please post it here

thanks

my crappy design

 

That looks good dude. I would go ahead with the build. I can see nothing wrong with it with one exception. I would put a valve past the split to the fuge down toward the LR. The 90 degree angle is going impeded water's progress to the fuge, so you will want some backpressure created by a valve below the split to force the water to your macroalgae.