JLab's JBuds J2 earphones carry an MSRP of $80 but list for $30 on Amazon. They're definitely not worth the higher price point, but they're comfortable, offer some sound isolation, and come in pretty much every color combo you can imagine. Most notably, the J2 earphones offer a stark improvement over stock 'buds.
The earpieces aren't the smallest we've seen, measuring 0.37 inch in diameter, but the straight aperture allowed CNET testers to get a relatively secure and comfortable fit. JLab includes three sizes of silicone sleeves to help in that regard.
Beyond fit and style, the JLab JBuds J2 earphones offer two other improvements over stock earbuds: sound isolation and bass. However, audio quality isn't the greatest overall: highs lack the detail and clarity we desire and the boomy bass lends a muddled quality to most songs. Still, at least there is bass, and mids also sound better than what you get from a stock set.