These smooth, strong bamboo needles are great for any project worked flat! Please note: All CPY needles labeled US 6/4.0mm are truly US 6/4.25mm needles labeled US 19/15.0mm are truly US 19/15.6mm.
Knitter's Pride Zing Single Pointed Needles is a similar needle: straight and US 4 (3.5mm) US size. You may also like Knitter's Pride Zing Fixed Circular Needles, which is another similar needle: 11.75" / 12" (30cm) and us 4 (3.5mm) us size.
You may enjoy taking a look at the Rowan Felted Tweed Robinia, Rowan Handknit Cotton Zack , Berroco Vintage Chunky and Vintage Ferry Hat, and Berroco Vintage Gift Pillow kits all using Crystal Palace Bamboo Single Points Needles.