diff --git a/base/bitarray.jl b/base/bitarray.jl
index 4411fc9323826..079dbefe03a94 100644
--- a/base/bitarray.jl
+++ b/base/bitarray.jl
@@ -482,7 +482,7 @@ end
 reshape(B::BitArray, dims::Tuple{Vararg{Int}}) = _bitreshape(B, dims)
 function _bitreshape(B::BitArray, dims::NTuple{N,Int}) where N
     prod(dims) == length(B) ||
-        throw(DimensionMismatch("new dimensions $(dims) must be consistent with array size $(length(B))"))
+        throw(DimensionMismatch("new dimensions $(dims) must be consistent with array length $(length(B))"))
     Br = BitArray{N}(undef, ntuple(i->0,Val(N))...)
     Br.chunks = B.chunks
     Br.len = prod(dims)
diff --git a/base/reshapedarray.jl b/base/reshapedarray.jl
index 63e508e8835de..f1bcc9fe303a7 100644
--- a/base/reshapedarray.jl
+++ b/base/reshapedarray.jl
@@ -39,7 +39,7 @@ eltype(::Type{<:ReshapedArrayIterator{I}}) where {I} = @isdefined(I) ? ReshapedI
 # reshaping to same # of dimensions
 @eval function reshape(a::Array{T,M}, dims::NTuple{N,Int}) where {T,N,M}
     throw_dmrsa(dims, len) =
-        throw(DimensionMismatch("new dimensions $(dims) must be consistent with array size $len"))
+        throw(DimensionMismatch("new dimensions $(dims) must be consistent with array length $len"))
     len = Core.checked_dims(dims...) # make sure prod(dims) doesn't overflow (and because of the comparison to length(a))
     if len != length(a)
         throw_dmrsa(dims, length(a))