8" X 13"
Once the painting is varnished, you will be able to see more detail in the background. I have found that many brown combinations dry dull and liven back to their original intensity once varnished.
My go-to spray varnish these days is Krylon Gallery Series UV Archival Varnish 1376 Semi-gloss.
It adds just the right sheen, not super glossy nor matte.