C.S. Osborne · Curved upholstery needles
C.S. Osborne No. 501X 4-Inch Extra-Light Curved Needles, 12 Pack

When to choose it
The four-inch 501X gives you an extra-light round point with a larger arc than the two-inch 501X. Compare it when the shorter curve cannot follow the reach you need around an upholstery seam. At this length Osborne specifies 18 gauge, so the longer option also changes the shaft gauge.
The four-inch size describes the space across the curved needle. Check that space near the seam and the thread at the eye. If you want to try several arcs first, compare the K-7 card. This selected box repeats the four-inch variant.
Specifications
- Brand
- C.S. Osborne
- Construction
- Extra-light curved round point
- Work task
- Upholstery seams
- Model
- 501X-4
- Point
- Round
- Profile
- Extra-light curved
- Size
- 4 in across overall
- Gauge
- 18
- Pack
- 12 needles
- Amazon.com reference
- B07QGHQQBJ
Fit and buying advice
Compare the arc with the available turning space and match the thread to the eye.
Related choice C.S. Osborne K-7 Extra-Light Curved Needle Card ↗
Compare options in this department ↗
Documentation
Questions about this product
Is the four-inch variant as fine as the two-inch model?
Osborne lists four inches at 18 gauge and two inches at 21 gauge. They differ in both reach and gauge.
Can I buy it as part of an assortment?
The K-7 card includes a four-inch option among four sizes. This pack repeats one size.
Does the arc measurement tell me how deep I can sew?
It describes the size across the curve. Check the actual path and turning room at your seam.


