Oona has a front panel that is demanding with an easy garter and stockinette block pattern at each side. The back is block pattern only. The ribbed sleeves and collar pull the look together.
You can easily lengthen the design in increments of 1 repeat of the main section of the front panel, approx. 2¼ in / 6 cm.
The buttons are optional.

Finished measurements
Chest 35½ (38½) 41¾ (45) 47¼ in
90 (98) 106 (114) 120 cm
Length 18 (18½) 19 (19¼) 19¾ in
46 (47) 48 (49) 50 cm