Setting inner size of figures generated by Plots.jl nside Pluto notebook

Currently I’m code follows as below

using Plots; gr(size=(600,600))

begin
Plots.plot([3,4],[10,8])
Plots.plot!(twinx(),[.8,.2],[.4,-4])
			
Plots.plot!(xguidefontsize=20,yguidefontsize=20,  tickfontsize=20, fontfamily="Computer Modern",framestyle=:box, legend=false, yrotation=90)
end

I’m setting the image size for different backends as plotly(size=(600,600)) but I want to tweak the inner size, ie.

Is there any other Plots.jl backend that can fix the above size instead of whole image size.

Pluto notebook
### A Pluto.jl notebook ###
# v0.19.35

using Markdown
using InteractiveUtils

# ╔═╡ 2a3c2aba-cf44-11ef-3876-3db2b6da2a06
begin
    # import Pkg
    # Pkg.activate("/home/hisacro/.julia/environments/v1.9/Project.toml")
	using Plots; gr(size=(600,600))
end

# ╔═╡ 77debfc3-e7ae-42ff-b444-f0276a2d87dc
begin
Plots.plot([3,4],[10,8])
Plots.plot!(twinx(),[.8,.2],[.4,-4])
			
Plots.plot!(xguidefontsize=20,yguidefontsize=20,  tickfontsize=20, fontfamily="Computer Modern",framestyle=:box, legend=false, yrotation=90)
end

# ╔═╡ Cell order:
# ╠═2a3c2aba-cf44-11ef-3876-3db2b6da2a06
# ╠═77debfc3-e7ae-42ff-b444-f0276a2d87dc