34B is a bra size that indicates a specific measurement for women's undergarments. The number '34' refers to the band size, which is the measurement around the ribcage just under the bust, while the letter 'B' denotes the cup size, indicating a moderate breast volume. This size is commonly found in various styles of bras, including sports bras, push-up bras, and everyday wear. Understanding bra sizes like 34B is essential for finding the right fit and support. Properly fitting bras can enhance comfort and confidence, making it important for women to know their measurements. Many brands offer a range of options in this size, catering to different preferences and needs.