Pure Flow Round Brush: Small vs Large for Volume
By Kent Brushes | The World's Finest Hairbrushes & Combs | Published: 2026-10-23
Category: Comparisons
Compare the Kent Pure Flow small and large round brushes to find which size adds more volume to your hair type and length.
Quick answer
Choose the small Pure Flow round brush for root lift and shorter hair, and the large version for all-over volume and soft curls on medium to long hair.
Barrel size controls volume placement
A smaller barrel (44mm) wraps less hair per section, making it easier to lift roots and add volume at the crown. A larger barrel (70mm) distributes tension over more hair, creating a smoother, fuller shape from mid-lengths to ends.
Your hair length is the main deciding factor. Short to shoulder-length styles benefit from the small brush's precision, while long hair needs the larger barrel to avoid tangling and to create even curls.
Vented design speeds drying for both sizes
Both the LPF4 and LPF5 feature an innovative vented barrel that maximizes airflow. This reduces blow-drying time regardless of size, which is especially helpful if you have thick or dense hair.
The trade-off is that the smaller brush, while faster for short sections, requires more passes for full-head styling. The larger brush covers more surface area per pass, so it can reduce overall styling time for longer hair.
Trade-offs at a glance
- Small (44mm) – LPF4: Best for root lift, short to shoulder-length hair, and precise volume placement. Requires more passes for full-head styling.
- Large (70mm) – LPF5: Best for all-over volume, soft curls, and medium to long hair. Covers more hair per pass, reducing overall styling time.
- Both share vented design: Maximizes airflow to speed up blow-drying. The smaller brush is still faster for short sections; the larger brush is more efficient for long hair. If you have thick hair, the vented design in either size will cut drying time compared to a solid barrel brush.
Product facts
- Pure Flow Small Vented 44mm Bristle Nylon Mix Round Brush - LPF4: Small vented round brush (44mm) with natural wood and bristle nylon mix. Ideal for root lift and fast blow-drying on shorter hair; the smaller barrel gives you more control for precise volume at the roots.
Pure Flow Small Vented 44mm Bristle Nylon Mix Round Brush - LPF4 - Pure Flow Large Vented 70mm Bristle Nylon Mix Round Brush - LPF5: Large vented round brush (70mm) with natural wood and bristle nylon mix; winner of 'Best Styling Hairbrush' in the Marie Claire UK Hair Awards 2021. Best for creating all-over volume and soft curls on medium to long hair; the larger barrel smooths longer sections while adding bounce.
Pure Flow Large Vented 70mm Bristle Nylon Mix Round Brush - LPF5
Which one fits you?
Best for
- Short to shoulder-length hair needing root lift and controlled volume
- Fine or thin hair where a smaller barrel prevents over-curling
Not ideal for
- Very long or thick hair that would benefit from the large barrel's coverage
- Anyone wanting loose, big curls without multiple sections
