This is a pushchair from Cybex. If you are looking for a narrower model, it may be worth considering this one, as it has a width of 49 cm.
From Amazon
Cybex Poussette Citadine Ultra Légère Melio 3 - Taupe/Hibiscus Red
For Your Little One
Cybex Melio Pushchair - Moon Black
Baby Monitors Direct
Cybex Melio TPE Stroller - Deep Black