Knitting pattern, PARI socks, socks

The PARI socks got their name because I purchased the beautiful yarn during a trip to PARIs, plus this colorway shows the colors of the French flag.
A simple structure as the 1x3 BRP (broken rib pattern) is the perfect canvas for a beautiful handdyed yarn and an ideal stretchy and comfy pattern for socks.
The socks are worked top down, using a strong heel construction. This method is very suitable for self-striping or self-patterning yarn since there is no unwanted interruption of the yarn pattern at the heel.

We love to see your knits on social media. Please use #PARIsocks and #ivnknit when sharing your version.

GAUGE
30 sts x 40 rounds/rows = 10 x 10 cm (4 x 4 inches) in 1x3 BRP (broken rib pattern), blocked

simple and detailed sockpattern
advanced beginner

SIZES
1 / 2 / 3 / 4 / 5 / 6 / 7
To fit leg circumference: approximately 18.5 / 20 / 21.5 / 23 / 24 / 25.5 / 26.5 cm (7.25 / 8 / 8.5 / 9 / 9.5 / 10 / 10.5 inches)
All sizes are customizable in length, check out the foot length table for all measurements and sizes.

FOOT LENGTH

cm 21.5 22.5 23.5 24 24.5 25 26 26.5 27 28 28.5 29
inches 8.5 8.75 9.5 9.5 9.75 10 10.25 10.5 10.75 11 11.25 11.5
EU 35 36 37 38 39 40 41 42 43 44 45 46
US women 3.5 5 6 6.5 7.5 8.5 9 10 10.5 11.5
US men 6.5 7.5 8 9 9.5 10.5 11 12
UK 2.5 3 4 4.5 5.5 6.5 7 8 8.5 9.5 10 11

NEEDLES
Circular needles or DPNs to obtain gauge; recommended needle size: 2.5 mm (US 1.5)

YARN/YARDAGE
RICO Design Superba Bamboo (50% Schurwolle, 25% Polyamid, 25% Viscose; 420 m pro 100 g)
For sizes 1-5, you need 100g of sock yarn/fingering weight (around 400 m (440 yds) per 100g).
For larger sizes or if you work longer legs you need more than 100g.

NOTIONS
Stitchmarkers (2), tapestry needle