Start with the actual serving
Read the gram weight and whether the nutrition applies to one bar, part of a bar or the whole packet. The wrapper is a container; it does not guarantee that every brand defines a serving in the same way.
Henry’s current product information describes a 50g bar. That is useful context for its listed protein, sugar and calorie figures. Keep the weight beside the numbers when comparing it with another product.
Match the size to the occasion
A short break before lunch and a long journey home may call for different amounts of food. Think about when you last ate, when you expect to eat next and what sounds appealing.
Avoid selecting a portion solely because it has the largest protein amount. You may simply be choosing a larger snack. That can be fine, but it is worth recognising the reason for the difference.
Use comparison maths carefully
If two bars share the same per-100g nutrition, the larger one will supply more of those nutrients per bar. That is a portion difference, not necessarily a different recipe quality.
If you plan to eat part of a bar, check storage instructions for the remainder. Do not assume an opened pack can be kept indefinitely. A smaller wrapped portion may be more convenient in that situation.
Let preference be useful information
A portion that looks ideal in a comparison table may not be the one you enjoy. Notice whether you want the full serving and whether it fits comfortably into your routine.
You do not need to assign a universal correct size to protein bars. Choose a suitable product and portion for the occasion, then use the label to understand it. The information should support the decision, rather than turn eating a snack into a maths exercise.