Look for strawberries that have a bright, vibrant red color. Avoid strawberries with white or green patches, as this is a sign that the fruit is not yet ripe. It should also have a glossy sheen, which is a sign of freshness. In addition, give your strawberry a gentle sniff. Its ripe should have a sweet, fragrant aroma. If it doesn't smell like strawberry or has no scent at all, it might be underripe or lacking in flavor. Actually, size doesn't always determine quality, but in general, larger strawberries tend to be juicier and sweeter. However, the key is balance – look for strawberries that are uniformly sized, as this can indicate consistent ripeness. Inspect the green leafy tops (calyx) of the strawberry. They should be fresh, green, and intact. A wilted or browning calyx can be a sign of older fruit.