Direct answer: a good starting kettlebell size for most beginners is about 12 to 16 kg (26 to 35 lb) for men and about 8 to 12 kg (18 to 26 lb) for women. If you’re unsure, start lighter to learn form, then progress as you gain strength and technique. Helpful context and guidelines:

• Beginners often start with a lighter weight to master fundamentals like hinge, squat, and press patterns before loading heavily. A 12 kg (26 lb) kettlebell is a common starting point for many men, while 8 kg (18 lb) or 12 kg (26 lb) can suit many women starting out. If the lighter options feel too easy or you have specific goals (heavy swings, presses, or hypertrophy), you can gradually move up.
• If you already have some baseline strength or plan to do a lot of swing and clean movements, many people progress to 16 kg (35 lb) as a first heavier option, especially for men.
• An ideal approach is to begin with one or two sizes and focus on form. For example, start with 12 kg (26 lb) and, after a few weeks of consistent, pain-free training with good technique, consider adding a second weight in the 8–16 kg range to tailor progression.

Practical starter plan:

• Week 1–2: Use 8–12 kg (18–26 lb) to learn hip hinge, body alignment, and basic movements (swings, goblet squats, presses).
• Week 3–6: If technique is solid and reps feel manageable (8–12 per set with proper form), test 12–16 kg (26–35 lb) for more challenging sets or heavier variations.
• Ongoing: Have a plan to gradually increase the weight or volume every few weeks as strength and technique allow.

What to consider when choosing:

• Your current strength and experience level
• The main exercises you plan to do (swings and cleans can handle heavier loads; Turkish get-ups and presses may require lighter loads to maintain form)
• Any injuries or movement limitations
• The availability of a second weight to allow progression without overloading too soon

If you’d like, share your gender, approximate training experience, and typical exercises you want to perform, and a tailored starting weight can be suggested.