Converting points to Polygons of a defined size

Hi Guys ,

i am not sure if this is in the correct place. i hope so.

What i would like to do is take some point data and convert it into polygons .

i would like each of my polygons to be 172 metres long and 124 metres wide i was wondering if there is some where i can do this in the conversion procress. i have look at certain tools but do not see an element for inputting this.

Although i am very new , so maybe i m missing something

Does any one have some tips

Thanks Jack