Carré is a cardigan with an unusual construction, in one piece and nearly seamless (only a little sewing at the wrong side for the pockets).
It is worked top down, starting with a provisional cast-on at the top of the center section. All waist shaping is done in this center stockinette section.
The large broken rib bands are worked all around in one piece - hence the name carré (square) - and they hide 2 pockets. You will need 3 or more circular needles to work them.

The sleeve inset is inspired by the contiguous sleeve method developed by Susie Myers, SusieM on Ravelry

Available for size: XS, S, M, L, XL, XXL
finished measurements chest: 32.5, 37, 40.5, 45, 48.5, 52.5” (83, 94, 103, 114, 123 , 134 cm)
Best with no ease or a little positive ease

What you’ll need
± 950/1100/1250/1400/1550/1700)m (1050/1200/1350/1550/1700/1850 yards) worsted /10ply
4,5mm (US7) straight ndls and circular needle or dpns or size to obtain gauge
4 or more 4mm (US6) circular ndls or dpns for the bands
markers
tapestry needle
14 buttons

Gauge
18 sts and 26 rows stockinette stitch with the largest needle
= 10 x 10 cm (4”x4”)

All techniques used (provisional cast-on, methods of increasing…) are explained and illustrated in full detail.

Errata:
typos
XL size, page 5: row 29: … , sM4, k to end. (instead of k1, m1L, k to end)
page 7: round 7-26:…,
even numbered rounds: work the broken rib pattern, increases in the corners and decreases at the shoulders (as described in round 2),