Bursts size in pixel

How many pixels cover one single burst in Sentinel-1 A\B? IW mode

Hi, The product annotation gives the size of each burst in range and azimuth. An example is given below:

    <burstList count="9">

which is followed by more information about each burst. There is an annotation file for each IW or EW polarisation and in the case of SLC product for each sub-swath and these files can be found in the product annotation folder. More information can also be found in the product specification document at https://sentinels.copernicus.eu/web/sentinel/user-guides/document-library/-/asset_publisher/xlslt4309D5h/content/sentinel-1-product-specification.