cut your coat according to your cloth
US /kʌt jʊər koʊt əˈkɔrdɪŋ tu jʊər klɔθ/
UK /kʌt jʊər koʊt əˈkɔrdɪŋ tu jʊər klɔθ/

1.
to live within your means; to spend no more money than you have
:
•
We can't afford a luxury vacation; we need to cut our coat according to our cloth.
•
Before making big plans, remember to cut your coat according to your cloth.