Amazon.com Inc. said Cyber Monday 2018 was the biggest selling day in the company’s history, with items like the new Echo Dot, AncestryDNA genetic testing kits, and “Becoming,” the memoir by Michelle Obama, among the top sellers.

In addition, Amazon AMZN, +2.49% says it sold more than 18 million toys and more than 12 million fashion items on Black Friday and Cyber Monday combined.

Toys are a hotly contested category, with retailers like Target Corp. TGT, +1.54% and Walmart Inc. WMT, +0.41% also competing to snap up the market share left by the Toys ‘R’ Us bankruptcy.

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The Echo Dot smart speaker was the best-selling product on Amazon around the world, with other Amazon devices like the Fire Stick TV 4K with Alexa voice remote and the Fire 7 tablet with Alexa selling well.

Amazon also talked up sales at its grocery acquisition Whole Foods Market in the weeks heading into Thanksgiving, with record-breaking turkey sales and high sales of prepared holiday meals.

Overall, Cyber Monday hit an all-time high of $7.9 billion in sales by the end of the day, which would make it the largest online shopping day ever in the U.S., according to Adobe Analytics ADBE, +2.58% data. Thanksgiving day tallied $3.7 billion and Black Friday rang up $6.2 billion in sales.

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In a nod to retailer efforts to integrate online and brick-and-mortar operations, consumers that bought online but picked up the merchandise in store rose a record 65%.

“In the full 24 hours on Cyber Monday, Americans spent a combined… 95 million hours on online shopping,” Adobe said.

Out-of-stock levels were 2.3% on Cyber Monday, up from a season average of 2.1%, which cost retailers as much as $177 million in lost potential sales.

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Smartphone revenue was $2.2 billion on Cyber Monday alone, the most ever.

“Converting mobile traffic to sales has long been a thorn in the side of retailers, but investments in making the experience faster and easier have paid off,” said Taylor Schreiner, director of Adobe Digital Insights.

Amazon has captured 24% of revenue of online holiday sales since November 1, the largest market share, followed by Best Buy Co Inc. BBY, +1.14% with 7%, according to Rakuten Intelligence data.