2015 Back-to-school trends

Back-to-school signs are displayed in a Target store in Chicago, Illinois.
Getty Images
Back-to-school signs are displayed in a Target store in Chicago, Illinois.

On Wednesday, Google released new data which found 'back to school' searches on its site have increased 48 percent from the prior year.

Not surprisingly, 50 percent of Google's back-to-school searches were done on mobile devices, compared to 40 percent last year

Read MoreBack-to-school: Will retailers' bets pay off?

Among the most popular searches on Google were for back-to-school apparel.

Google Image searches for "school outfit" have been growing dramatically for the past three years and they are already up 72 percent for July, compared to the same time last year.

Top Rising Back-to-School Searches on Google

Curry One shoes

Quay sunglasses

Walt Disney Vans

Lace-up flats

Top Declining Back-to-School Searches on Google

Wedge sneakers

Paracord bracelets

High-waisted shorts

Bro tanks

Combat boots

Retail analyst and CNBC contributor Stacey Widlitz told CNBC's "Power Lunch" Wednesday, she is not surprised footwear topped the search trends.

"This category continues to steal share from apparel. Indeed, footwear is the new handbag among young adults."

Widlitz points out how savvy Disney has been tying two top trends – Vans and movie branding.

"If history is any lesson future Disney stars will no doubt continue to capture the heart of kids and the wallet share of parents," said Widlitz.

Read MoreNot so fast! Shoppers' pullback seen continuing

According to the National Retail Federation's annual Back-to-School Spending Survey, total spending for kindergarten through college is expected to reach $68 billion this year.