The phrase "close to full" is correct and usable in written English.
It is used when something is almost complete. For example, "The store shelves are close to full with the new shipment of products."
Older style grandstands, but they're close to full and noisy.
But put together, they achieve something close to full resistance.
It's barely lunchtime and the place is close to full.
The control floor operated with longer watering to achieve close to full saturation.
However, fine adjustments of bonus parameters can bring the channel close to full coordination.
Most of the fish were close to full time residents in the monitored area.
And with unemployment at 4.5percentt, we are at or close to full employment.
Although the autumn migration was barely under way, the freezer was already close to full.
Too many state workers can retire in their mid-50s on close to full pay.
"Today, you're just trying to get it close to full again," he said.
With the return of Chris Bosh, the Heat is once again close to full strength.
