Could that be an immature black widow male?
Porbably one of the tunnelweb spiders the banded tunnelweb spider and the black tunnelweb spider both have a body legnth of 25mm.
The only spider I have seen like this was a common sight in Kimberley South Africa. We called it a button spider because its back look like a button. It was not a black widow and it was not orange and did not have the hourglass marking that is common with the black or brown widow - also called the button spider.
could be a spider wasp
There is an estimated 43,678 species of spiders in the world. It is best to avoid any spider or insect that can not be identified. One way to identify a spider could be to go to the library to research spiders comparing images in a book.
The Zebra spider, Salticus scenicus, is known as such because of its black and white striped body. It is a common jumping spider.
One possibility is the common jumping spider, which has a black body and white rings around its legs. Its scientific name is phidippus audax.
This spider more than likely is an Argiope, this is a common spider than can be found all over the world. If you seen the web, this spider is known to spin a white zigzag pattern on their web.
black widow
a black spider
I suggest it's a Zebra spider; a species of jumping spider. See the link I've attached below in the related links section.
My son just killed on just like that with Orange fangs and a hour glass on its body so everyone who answered stupid its true and out there
A RED BACK!!! bY THE WAY I WOULDN'T TOUCH IT!! THEY ARE REALLY DEADLY, ESPECIALLY THE BABY ONES!!! ^ i wouldn't pay attention to that If the red is on the belly then worry more, it the red is on the back its not a black widow, ive seen a bunch of spiders with a black body and white stripe, they are jumping spiders, the red button i don't know much about.