"simple decoration" is correct and usable in written English.
You can use it to refer to a decoration or ornament that is plain or not overly intricate or elaborate. For example, "The table was adorned with a few simple decorations of greenery and some pretty candles."
For the decorator and the collector, these pieces are sought after as investments or simple decoration.
A Maltese cross design for dangling earrings and some trickles of embroidery on both sides of the bodice made for simple decoration, like the arch of flowers at a pocket.
Well finished and clean in appearance with simple decoration, Queen's ware became, by virtue of its durable material and serviceable forms, the standard domestic pottery and enjoyed a worldwide market.
Made of coiled sumac shoots in a natural color, with a simple decoration of small brown-dyed triangles arranged in widely separated vertical lines, this elegant bowl with its braided rim has a less-is-more presence that is utterly serene.
It is not one of the most interesting, small and with comparatively simple decoration, but his mummy is still there, and for us, the fact of having been inside his resting place put in to context the display in the museum in Cairo of the contents of Tutankhamun's tomb.
"For example, each of the top hotel owners in China, the top restaurant owners in China, they are finding out that simple decoration is not going to show they're the top.
The overall form of the caskets follows French examples, and the locks and metal bands are decorated in Gothic style with "simple decorations of fleurons and debased egg and dart" while the whalebone panels are carved in relief with a late form of Insular interwoven strapwork characteristic of late Medieval West Scotland.
Are there simple decorations that will make us look festive without all the work?
By the time we'd nabbed a few simple decorations, some dressy items off the sales rack and a Costco cake, we'd gone into three separate overdrafts.
Don't have anything on them, except one or two simple decorations.
