Look carefully at both inside and outside of existing wheels. Aluminum wheels will often have a size designation molded into the casting, often at the back of the wheel center "hub" or in the back of a "spoke". All depending on style of aluminum wheel.
Steel wheels will have size markings stamped into the bead area.
These markings will give diameter and width.
For odd number bolt circle just measure the center to center distance between two adjoining wheel stud holes. You can then determine the bolt circle diameter from any number of wheel manufacturer web sites. For even number of lug nut holes just measure opposing center distances.
Here's a guide:
http://www.crawlpedia.com/bolt_patterns.htm
FWIW, most tire outlets also have wheels available. Amazon is not always cheapest and if a Dealer is selling you tires he may make you a good deal. Yes, even "Sam's".
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"A wise man can change his mind. A fool never will." (Japanese Proverb)
"You only grow old when you run out of new things to do"
2018 Flagstaff Micro Lite 25BDS
2023 f-150 SCREW XLT 3.5 Ecoboost (The result of a $68,000 oil change
)