library(ggplot2)
library(ggforce)

dat = read.table(text=
" x   y sizes
  1   -1.75    0.25
  1   -1.5  0.5
  1   -1   1
  1   -0.5  1.5
  1   -0.7  1.3
  1   -0.8  1.2
  1   0   2", header=TRUE)
################################absolute value = 2
dat

##   x     y sizes
## 1 1 -1.75  0.25
## 2 1 -1.50  0.50
## 3 1 -1.00  1.00
## 4 1 -0.50  1.50
## 5 1 -0.70  1.30
## 6 1 -0.80  1.20
## 7 1  0.00  2.00

ggplot(dat, aes(x0=x, y0=y, r=sizes)) + 
  geom_circle() + coord_equal() + theme_classic()