Find area and perimeters of labeled segments for binary image

Specific Domains Signal and Image Processing
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1

Hi! I try to calculate area and perimeters of labeled regions of binary image. For example:

using Images, ImageView, ImageSegmentation, TestImages, IndirectArrays, ImageMorphology
img = testimage("blobs")
# f = AdaptiveThreshold(window_size = 512)
f = Otsu()
imgbin = binarize(img, f);

seg = fast_scanning(imgbin, 0.2);
labels_map(seg);

Maybe, this question is trivial, but in offical docs and other post in stackoverflow or here I couldn’t find answer of this topic.

How to evalute this regions geometrical propertires?