Depending on your budget, needs and look of your bathroom, you also need to choose between a traditional fully enclosed shower stall or a walk-in shower:
Full shower enclosures are the best all-in-one solution: as well as the door and glass structure, they usually include shower panels to protect your walls from water and moisture, and a bottom tray to keep your floor tiles safe;
Walk-in showers are stylish options that make your bathroom look more spacious: while maintaining the door and glass structure, they rely on your existing tiles when it comes to both horizontal and vertical surfaces;
it only makes sense to have a walk-in shower if your bathroom involves durable tiles (such as ceramic or stone) that wouldn't result in wet accidents, or if you're happy to invest in having it retiled before buying the enclosure needed to create a walk-in shower;
these showers are also a more accessible option for those suffering from mobility issues.