The Wemo WiFi Smart Plug, which was announced at CES earlier this year, is now available. It's roughly half the size of the original version of the Wemo Mini, which has been one of the best all-around smart plugs for some time.
The new smart plug still has all the same features as the Wemo Mini, including compatibility with all the major smart ecosystems (Amazon Alexa, Google Assistant and Apple HomeKit), and a physical on/off button on the smart plug, in case you don't want to use voice control or open the smartphone app. The difference is that the Wemo WiFi Smart Plug is small enough to fit into any electrical outlet without obstructing other sockets.
Right now, the Wemo WiFi Smart Plug is available at Belkin.com; you can buy one smart plug for $25. However, if you're thinking of buying more than one, Best Buy is selling three packs for $50, so you're buying two and getting the third smart plug for free.
If you don't care about the size difference and are just looking for a great smart plug, the Wemo Mini is on sale for $20, here.