finding the value of a corresponding column in matrix

hello, i have matrix A which consists of two columns. one is the size of the shoe and the second is the model.

how can i find the models that are in a specific size? for example, if the shoe size is 40, i need the models that are in that size.

function A=MatModel()
size1=randi([35,47],25,1);
model=randi([6,13],25,1);
A=[size1,model];
end

function modelvec=ShModel(A,x)
A=MatModel()
size1=MatModel;
x=input('what is your shoe size: ');
for i=1:25
    c=find(A==x);
    
end
size1(size1=c)
end

Answer 1

[Matt J]

models = A(A(:,1)==40,2)

[yas bat]

thank you so much!